From 20dad3aabf1fe6e1fa23d11090797bedb8e93270 Mon Sep 17 00:00:00 2001
From: AllanFly120 <zheallan@amazon.com>
Date: Thu, 5 Mar 2020 19:02:08 +0000
Subject: [PATCH] feat: codegen for fixing protocol tests

* Protocol codegen fixes via protocol tests (awslabls/smithy-typescript#141)
---
 .../protocols/Aws_restJson1_1.ts              |  20 +-
 .../client-acm-pca/protocols/Aws_json1_1.ts   |  12 +-
 clients/client-acm/protocols/Aws_json1_1.ts   |  44 +-
 .../protocols/Aws_json1_1.ts                  |  88 ++-
 .../protocols/Aws_restJson1_1.ts              |  22 +-
 .../protocols/Aws_restJson1_1.ts              |  42 +-
 .../protocols/Aws_restJson1_1.ts              |  46 +-
 .../protocols/Aws_restJson1_1.ts              |  92 ++-
 .../protocols/Aws_restJson1_1.ts              |  16 +-
 .../protocols/Aws_json1_1.ts                  |  22 +-
 .../protocols/Aws_json1_1.ts                  |  98 ++-
 .../protocols/Aws_json1_1.ts                  |  18 +-
 .../client-appstream/protocols/Aws_json1_1.ts | 104 +++-
 .../protocols/Aws_restJson1_1.ts              |  22 +-
 .../client-athena/protocols/Aws_json1_1.ts    |  24 +-
 .../protocols/Aws_json1_1.ts                  |  54 +-
 .../protocols/Aws_query.ts                    | 104 ++--
 .../protocols/Aws_restJson1_1.ts              |  42 +-
 .../client-batch/protocols/Aws_restJson1_1.ts |  94 ++-
 .../client-budgets/protocols/Aws_json1_1.ts   |  24 +-
 .../client-chime/protocols/Aws_restJson1_1.ts | 112 +++-
 .../client-cloud9/protocols/Aws_json1_1.ts    |  12 +-
 .../protocols/Aws_restJson1_1.ts              | 142 +++--
 .../protocols/Aws_query.ts                    |  56 +-
 .../protocols/Aws_restXml.ts                  |  92 +--
 .../protocols/Aws_json1_1.ts                  |  24 +-
 .../client-cloudhsm/protocols/Aws_json1_1.ts  |  24 +-
 .../client-cloudsearch/protocols/Aws_query.ts |  16 +-
 .../protocols/Aws_json1_1.ts                  |  62 +-
 .../protocols/Aws_json1_1.ts                  |  68 ++-
 .../protocols/Aws_json1_1.ts                  |  40 +-
 .../client-cloudwatch/protocols/Aws_query.ts  |  68 +--
 .../client-codebuild/protocols/Aws_json1_1.ts |  96 ++-
 .../protocols/Aws_json1_1.ts                  |  82 ++-
 .../protocols/Aws_json1_1.ts                  | 182 ++++--
 .../protocols/Aws_json1_1.ts                  |  70 ++-
 .../protocols/Aws_restJson1_1.ts              |  46 +-
 .../client-codestar/protocols/Aws_json1_1.ts  |  12 +-
 .../protocols/Aws_json1_1.ts                  | 164 +++--
 .../protocols/Aws_json1_1.ts                  |  46 +-
 .../protocols/Aws_restJson1_1.ts              |  14 +-
 .../protocols/Aws_json1_1.ts                  |  38 +-
 .../protocols/Aws_json1_0.ts                  |  30 +-
 .../protocols/Aws_json1_1.ts                  | 232 +++++--
 .../protocols/Aws_restJson1_1.ts              |  40 +-
 .../protocols/Aws_restJson1_1.ts              |   6 +-
 .../protocols/Aws_json1_1.ts                  |  12 +-
 .../protocols/Aws_json1_1.ts                  |  36 +-
 .../protocols/Aws_json1_1.ts                  |  64 +-
 .../protocols/Aws_json1_1.ts                  |  56 +-
 .../protocols/Aws_restJson1_1.ts              |  18 +-
 .../client-datasync/protocols/Aws_json1_1.ts  |  46 +-
 clients/client-dax/protocols/Aws_json1_1.ts   |  62 +-
 .../protocols/Aws_restJson1_1.ts              |  14 +-
 .../protocols/Aws_json1_1.ts                  |  68 ++-
 .../protocols/Aws_json1_1.ts                  |  26 +-
 .../protocols/Aws_json1_1.ts                  |  88 ++-
 .../client-dlm/protocols/Aws_restJson1_1.ts   |  58 +-
 clients/client-docdb/protocols/Aws_query.ts   |  44 +-
 .../client-dynamodb/protocols/Aws_json1_0.ts  | 238 +++++---
 clients/client-ec2/protocols/Aws_ec2.ts       | 572 ++++++++---------
 clients/client-ecr/protocols/Aws_json1_1.ts   |  50 +-
 clients/client-ecs/protocols/Aws_json1_1.ts   | 310 +++++++---
 .../client-efs/protocols/Aws_restJson1_1.ts   |  34 +-
 .../client-eks/protocols/Aws_restJson1_1.ts   |  36 +-
 .../protocols/Aws_query.ts                    |  56 +-
 .../protocols/Aws_query.ts                    | 100 +--
 .../protocols/Aws_query.ts                    |  56 +-
 .../protocols/Aws_restJson1_1.ts              |  98 ++-
 .../client-elasticache/protocols/Aws_query.ts |  84 +--
 .../protocols/Aws_restJson1_1.ts              |  20 +-
 clients/client-emr/protocols/Aws_json1_1.ts   | 198 ++++--
 .../protocols/Aws_json1_1.ts                  |  68 ++-
 .../client-firehose/protocols/Aws_json1_1.ts  |  48 +-
 clients/client-fms/protocols/Aws_json1_1.ts   |  32 +-
 .../client-forecast/protocols/Aws_json1_1.ts  |  88 ++-
 .../protocols/Aws_json1_1.ts                  |  48 +-
 clients/client-fsx/protocols/Aws_json1_1.ts   |  80 ++-
 .../client-gamelift/protocols/Aws_json1_1.ts  | 136 +++--
 .../protocols/Aws_restJson1_1.ts              |  28 +-
 .../protocols/Aws_json1_1.ts                  |  16 +-
 clients/client-glue/protocols/Aws_json1_1.ts  | 322 +++++++---
 .../protocols/Aws_restJson1_1.ts              |  84 ++-
 .../protocols/Aws_restJson1_1.ts              |  40 +-
 .../protocols/Aws_restJson1_1.ts              |  56 +-
 .../client-health/protocols/Aws_json1_1.ts    | 114 +++-
 clients/client-iam/protocols/Aws_query.ts     |  52 +-
 .../protocols/Aws_restJson1_1.ts              |  72 ++-
 .../client-inspector/protocols/Aws_json1_1.ts | 114 +++-
 .../protocols/Aws_restJson1_1.ts              |  34 +-
 .../protocols/Aws_restJson1_1.ts              |  56 +-
 .../client-iot/protocols/Aws_restJson1_1.ts   | 198 ++++--
 .../protocols/Aws_restJson1_1.ts              |  78 ++-
 .../protocols/Aws_json1_1.ts                  |  18 +-
 .../protocols/Aws_json1_1.ts                  |  80 ++-
 .../client-kafka/protocols/Aws_restJson1_1.ts |  14 +-
 .../client-kendra/protocols/Aws_json1_1.ts    | 122 +++-
 .../protocols/Aws_json1_1.ts                  | 128 ++--
 .../protocols/Aws_json1_1.ts                  |  84 ++-
 .../protocols/Aws_restJson1_1.ts              |   6 +-
 .../protocols/Aws_restJson1_1.ts              |  28 +-
 .../client-kinesis/protocols/Aws_json1_1.ts   |  20 +-
 clients/client-kms/protocols/Aws_json1_1.ts   |  24 +-
 .../protocols/Aws_json1_1.ts                  |  52 +-
 .../protocols/Aws_restJson1_1.ts              |  24 +-
 .../protocols/Aws_restJson1_1.ts              |  58 +-
 .../protocols/Aws_restJson1_1.ts              |   8 +-
 .../protocols/Aws_json1_1.ts                  |  62 +-
 .../client-lightsail/protocols/Aws_json1_1.ts |  78 ++-
 .../protocols/Aws_json1_1.ts                  |  18 +-
 clients/client-macie/protocols/Aws_json1_1.ts |  26 +-
 .../protocols/Aws_restJson1_1.ts              |  16 +-
 .../protocols/Aws_restJson1_1.ts              |  22 +-
 .../protocols/Aws_json1_1.ts                  |   6 +-
 .../protocols/Aws_json1_1.ts                  |   8 +-
 .../protocols/Aws_restJson1_1.ts              |  24 +-
 .../protocols/Aws_restJson1_1.ts              | 200 ++++--
 .../protocols/Aws_restJson1_1.ts              | 200 +++---
 .../protocols/Aws_restJson1_1.ts              |  30 +-
 .../protocols/Aws_restJson1_1.ts              |  31 +-
 .../protocols/Aws_json1_1.ts                  |  44 +-
 .../protocols/Aws_json1_1.ts                  |  14 +-
 .../client-mq/protocols/Aws_restJson1_1.ts    |  14 +-
 clients/client-mturk/protocols/Aws_json1_1.ts |  74 ++-
 clients/client-neptune/protocols/Aws_query.ts |  52 +-
 .../protocols/Aws_restJson1_1.ts              |   8 +-
 .../client-opsworks/protocols/Aws_json1_1.ts  |  52 +-
 .../protocols/Aws_json1_1.ts                  |  26 +-
 .../protocols/Aws_json1_1.ts                  |  18 +-
 .../protocols/Aws_restJson1_1.ts              |   8 +-
 .../protocols/Aws_restJson1_1.ts              |   6 +-
 .../protocols/Aws_json1_1.ts                  |  42 +-
 clients/client-pi/protocols/Aws_json1_1.ts    |  14 +-
 .../protocols/Aws_restJson1_1.ts              |  54 +-
 .../protocols/Aws_restJson1_1.ts              |   6 +-
 .../protocols/Aws_restJson1_1.ts              |  74 ++-
 .../client-polly/protocols/Aws_restJson1_1.ts |  12 +-
 .../client-pricing/protocols/Aws_json1_1.ts   |   6 +-
 .../protocols/Aws_json1_0.ts                  |   8 +-
 .../protocols/Aws_restJson1_1.ts              | 152 +++--
 .../client-ram/protocols/Aws_restJson1_1.ts   |  58 +-
 .../protocols/Aws_restJson1_1.ts              |  48 +-
 clients/client-rds/protocols/Aws_query.ts     |  80 +--
 .../client-redshift/protocols/Aws_query.ts    |  76 +--
 .../protocols/Aws_json1_1.ts                  |  30 +-
 .../protocols/Aws_json1_1.ts                  |  56 +-
 .../protocols/Aws_restJson1_1.ts              |  34 +-
 .../protocols/Aws_restJson1_1.ts              |  92 ++-
 .../protocols/Aws_json1_1.ts                  |  34 +-
 .../client-route-53/protocols/Aws_restXml.ts  |  32 +-
 .../protocols/Aws_json1_1.ts                  |  46 +-
 .../protocols/Aws_restXml.ts                  |  16 +-
 clients/client-s3/protocols/Aws_restXml.ts    |  92 +--
 .../protocols/Aws_restJson1_1.ts              |   6 +-
 .../client-sagemaker/protocols/Aws_json1_1.ts | 412 +++++++++----
 .../protocols/Aws_restJson1_1.ts              | 155 ++++-
 .../protocols/Aws_restJson1_1.ts              |   6 +-
 .../protocols/Aws_json1_1.ts                  |  18 +-
 .../protocols/Aws_restJson1_1.ts              | 197 ++++--
 .../protocols/Aws_restJson1_1.ts              |  40 +-
 .../protocols/Aws_json1_1.ts                  |  99 ++-
 .../protocols/Aws_json1_1.ts                  |  44 +-
 clients/client-ses/protocols/Aws_query.ts     |  82 +--
 .../client-sesv2/protocols/Aws_restJson1_1.ts |  60 +-
 clients/client-sfn/protocols/Aws_json1_0.ts   |  20 +-
 .../client-shield/protocols/Aws_json1_1.ts    |  14 +-
 clients/client-sms/protocols/Aws_json1_1.ts   |  74 ++-
 .../client-snowball/protocols/Aws_json1_1.ts  |  38 +-
 clients/client-sns/protocols/Aws_query.ts     |  32 +-
 clients/client-sqs/protocols/Aws_query.ts     |  58 +-
 clients/client-ssm/protocols/Aws_json1_1.ts   | 576 +++++++++++++-----
 .../protocols/Aws_restJson1_1.ts              |   6 +-
 .../protocols/Aws_json1_1.ts                  |  66 +-
 clients/client-sts/protocols/Aws_query.ts     |  12 +-
 .../client-support/protocols/Aws_json1_1.ts   |  32 +-
 clients/client-swf/protocols/Aws_json1_0.ts   |  28 +-
 .../client-textract/protocols/Aws_json1_1.ts  |  12 +-
 .../protocols/Aws_json1_1.ts                  |  12 +-
 .../client-transfer/protocols/Aws_json1_1.ts  |  32 +-
 .../client-translate/protocols/Aws_json1_1.ts |  12 +-
 .../protocols/Aws_json1_1.ts                  | 124 ++--
 clients/client-waf/protocols/Aws_json1_1.ts   | 124 ++--
 clients/client-wafv2/protocols/Aws_json1_1.ts |  74 ++-
 .../protocols/Aws_restJson1_1.ts              |  14 +-
 .../protocols/Aws_restJson1_1.ts              |  12 +-
 .../client-workmail/protocols/Aws_json1_1.ts  |   6 +-
 .../protocols/Aws_json1_1.ts                  | 116 +++-
 .../client-xray/protocols/Aws_restJson1_1.ts  |  30 +-
 188 files changed, 8623 insertions(+), 3755 deletions(-)

diff --git a/clients/client-accessanalyzer/protocols/Aws_restJson1_1.ts b/clients/client-accessanalyzer/protocols/Aws_restJson1_1.ts
index bdbb432f52768..67fe2daa5b4fe 100644
--- a/clients/client-accessanalyzer/protocols/Aws_restJson1_1.ts
+++ b/clients/client-accessanalyzer/protocols/Aws_restJson1_1.ts
@@ -2744,7 +2744,11 @@ const serializeAws_restJson1_1FindingIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1InlineArchiveRule = (
@@ -2768,9 +2772,11 @@ const serializeAws_restJson1_1InlineArchiveRulesList = (
   input: Array<InlineArchiveRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InlineArchiveRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InlineArchiveRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SortCriteria = (
@@ -2802,7 +2808,11 @@ const serializeAws_restJson1_1ValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ActionList = (
diff --git a/clients/client-acm-pca/protocols/Aws_json1_1.ts b/clients/client-acm-pca/protocols/Aws_json1_1.ts
index 749b211c2c0eb..bd3ea28ea0457 100644
--- a/clients/client-acm-pca/protocols/Aws_json1_1.ts
+++ b/clients/client-acm-pca/protocols/Aws_json1_1.ts
@@ -2756,7 +2756,11 @@ const serializeAws_json1_1ActionList = (
   input: Array<ActionType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CertificateAuthorityConfiguration = (
@@ -3132,7 +3136,11 @@ const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagCertificateAuthorityRequest = (
diff --git a/clients/client-acm/protocols/Aws_json1_1.ts b/clients/client-acm/protocols/Aws_json1_1.ts
index f806b0cc8883d..79b3519f6907c 100644
--- a/clients/client-acm/protocols/Aws_json1_1.ts
+++ b/clients/client-acm/protocols/Aws_json1_1.ts
@@ -1657,7 +1657,11 @@ const serializeAws_json1_1CertificateStatuses = (
   input: Array<CertificateStatus | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteCertificateRequest = (
@@ -1686,7 +1690,11 @@ const serializeAws_json1_1DomainList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DomainValidationOption = (
@@ -1707,9 +1715,11 @@ const serializeAws_json1_1DomainValidationOptionList = (
   input: Array<DomainValidationOption>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DomainValidationOption(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DomainValidationOption(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ExportCertificateRequest = (
@@ -1730,7 +1740,11 @@ const serializeAws_json1_1ExtendedKeyUsageFilterList = (
   input: Array<ExtendedKeyUsageName | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filters = (
@@ -1801,14 +1815,22 @@ const serializeAws_json1_1KeyAlgorithmList = (
   input: Array<KeyAlgorithm | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1KeyUsageFilterList = (
   input: Array<KeyUsageName | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListCertificatesRequest = (
@@ -1948,7 +1970,11 @@ const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateCertificateOptionsRequest = (
diff --git a/clients/client-alexa-for-business/protocols/Aws_json1_1.ts b/clients/client-alexa-for-business/protocols/Aws_json1_1.ts
index c902aba20e72a..11983471c8ddd 100644
--- a/clients/client-alexa-for-business/protocols/Aws_json1_1.ts
+++ b/clients/client-alexa-for-business/protocols/Aws_json1_1.ts
@@ -8429,14 +8429,22 @@ const serializeAws_json1_1FilterList = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IPDialIn = (
@@ -8502,7 +8510,11 @@ const serializeAws_json1_1AudioList = (
   input: Array<Audio>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Audio(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Audio(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Content = (
@@ -8575,7 +8587,11 @@ const serializeAws_json1_1SsmlList = (
   input: Array<Ssml>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Ssml(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Ssml(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Text = (
@@ -8596,7 +8612,11 @@ const serializeAws_json1_1TextList = (
   input: Array<Text>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Text(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Text(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteDeviceUsageDataRequest = (
@@ -9383,14 +9403,22 @@ const serializeAws_json1_1EndOfMeetingReminderMinutesList = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Features = (
   input: Array<Feature | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ForgetSmartHomeAppliancesRequest = (
@@ -9732,9 +9760,11 @@ const serializeAws_json1_1PhoneNumberList = (
   input: Array<PhoneNumber>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PhoneNumber(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PhoneNumber(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutConferencePreferenceRequest = (
@@ -10112,7 +10142,11 @@ const serializeAws_json1_1ShortSkillIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SipAddress = (
@@ -10133,9 +10167,11 @@ const serializeAws_json1_1SipAddressList = (
   input: Array<SipAddress>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SipAddress(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SipAddress(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Sort = (
@@ -10156,7 +10192,11 @@ const serializeAws_json1_1SortList = (
   input: Array<Sort>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Sort(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Sort(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartDeviceSyncRequest = (
@@ -10205,14 +10245,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -10233,7 +10281,11 @@ const serializeAws_json1_1TrustAnchorList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceRequest = (
diff --git a/clients/client-amplify/protocols/Aws_restJson1_1.ts b/clients/client-amplify/protocols/Aws_restJson1_1.ts
index ca8202e013866..3ba037fa54308 100644
--- a/clients/client-amplify/protocols/Aws_restJson1_1.ts
+++ b/clients/client-amplify/protocols/Aws_restJson1_1.ts
@@ -5542,7 +5542,11 @@ const serializeAws_restJson1_1AutoBranchCreationPatterns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CustomRule = (
@@ -5569,9 +5573,11 @@ const serializeAws_restJson1_1CustomRules = (
   input: Array<CustomRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CustomRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CustomRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1EnvironmentVariables = (
@@ -5614,9 +5620,11 @@ const serializeAws_restJson1_1SubDomainSettings = (
   input: Array<SubDomainSetting>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SubDomainSetting(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SubDomainSetting(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
diff --git a/clients/client-api-gateway/protocols/Aws_restJson1_1.ts b/clients/client-api-gateway/protocols/Aws_restJson1_1.ts
index 58f54d1f4316a..1e25e1be39fe5 100644
--- a/clients/client-api-gateway/protocols/Aws_restJson1_1.ts
+++ b/clients/client-api-gateway/protocols/Aws_restJson1_1.ts
@@ -21721,32 +21721,44 @@ const serializeAws_restJson1_1ListOfARNs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfApiStage = (
   input: Array<ApiStage>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ApiStage(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ApiStage(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfEndpointType = (
   input: Array<EndpointType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfStageKeys = (
   input: Array<StageKey>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1StageKey(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1StageKey(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1MapOfApiStageThrottleSettings = (
@@ -21845,16 +21857,22 @@ const serializeAws_restJson1_1ListOfPatchOperation = (
   input: Array<PatchOperation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1PatchOperation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1PatchOperation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfString = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PatchOperation = (
diff --git a/clients/client-apigatewayv2/protocols/Aws_restJson1_1.ts b/clients/client-apigatewayv2/protocols/Aws_restJson1_1.ts
index 99dcc0fe365b9..44da8c86e4e8b 100644
--- a/clients/client-apigatewayv2/protocols/Aws_restJson1_1.ts
+++ b/clients/client-apigatewayv2/protocols/Aws_restJson1_1.ts
@@ -9964,7 +9964,11 @@ const serializeAws_restJson1_1AuthorizationScopes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Cors = (
@@ -10009,21 +10013,33 @@ const serializeAws_restJson1_1CorsHeaderList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CorsMethodList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CorsOriginList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DomainNameConfiguration = (
@@ -10067,16 +10083,24 @@ const serializeAws_restJson1_1DomainNameConfigurations = (
   input: Array<DomainNameConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DomainNameConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1DomainNameConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1IdentitySourceList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1IntegrationParameters = (
@@ -10214,7 +10238,11 @@ const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1AccessLogSettings = (
diff --git a/clients/client-app-mesh/protocols/Aws_restJson1_1.ts b/clients/client-app-mesh/protocols/Aws_restJson1_1.ts
index b9a920ee8977c..c37b54a9a7aa7 100644
--- a/clients/client-app-mesh/protocols/Aws_restJson1_1.ts
+++ b/clients/client-app-mesh/protocols/Aws_restJson1_1.ts
@@ -4919,9 +4919,13 @@ const serializeAws_restJson1_1AwsCloudMapInstanceAttributes = (
   input: Array<AwsCloudMapInstanceAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AwsCloudMapInstanceAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1AwsCloudMapInstanceAttribute(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AwsCloudMapServiceDiscovery = (
@@ -4961,9 +4965,11 @@ const serializeAws_restJson1_1Backends = (
   input: Array<Backend>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Backend(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Backend(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DnsServiceDiscovery = (
@@ -5056,7 +5062,11 @@ const serializeAws_restJson1_1GrpcRetryPolicyEvents = (
   input: Array<GrpcRetryPolicyEvent | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1GrpcRoute = (
@@ -5143,9 +5153,11 @@ const serializeAws_restJson1_1GrpcRouteMetadataList = (
   input: Array<GrpcRouteMetadata>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1GrpcRouteMetadata(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1GrpcRouteMetadata(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1GrpcRouteMetadataMatchMethod = (
@@ -5240,7 +5252,11 @@ const serializeAws_restJson1_1HttpRetryPolicyEvents = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1HttpRoute = (
@@ -5307,9 +5323,11 @@ const serializeAws_restJson1_1HttpRouteHeaders = (
   input: Array<HttpRouteHeader>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1HttpRouteHeader(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1HttpRouteHeader(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1HttpRouteMatch = (
@@ -5359,9 +5377,11 @@ const serializeAws_restJson1_1Listeners = (
   input: Array<Listener>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Listener(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Listener(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Logging = (
@@ -5471,16 +5491,22 @@ const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagList = (
   input: Array<TagRef>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TagRef(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1TagRef(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagRef = (
@@ -5501,7 +5527,11 @@ const serializeAws_restJson1_1TcpRetryPolicyEvents = (
   input: Array<TcpRetryPolicyEvent | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TcpRoute = (
@@ -5593,9 +5623,13 @@ const serializeAws_restJson1_1VirtualRouterListeners = (
   input: Array<VirtualRouterListener>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1VirtualRouterListener(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1VirtualRouterListener(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1VirtualRouterServiceProvider = (
@@ -5679,9 +5713,11 @@ const serializeAws_restJson1_1WeightedTargets = (
   input: Array<WeightedTarget>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1WeightedTarget(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1WeightedTarget(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1AccessLog = (
diff --git a/clients/client-appconfig/protocols/Aws_restJson1_1.ts b/clients/client-appconfig/protocols/Aws_restJson1_1.ts
index 3f192dd405fc3..6aeb7d0b4488d 100644
--- a/clients/client-appconfig/protocols/Aws_restJson1_1.ts
+++ b/clients/client-appconfig/protocols/Aws_restJson1_1.ts
@@ -4331,9 +4331,11 @@ const serializeAws_restJson1_1MonitorList = (
   input: Array<Monitor>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Monitor(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Monitor(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
@@ -4365,9 +4367,11 @@ const serializeAws_restJson1_1ValidatorList = (
   input: Array<Validator>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Validator(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Validator(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1Application = (
diff --git a/clients/client-application-auto-scaling/protocols/Aws_json1_1.ts b/clients/client-application-auto-scaling/protocols/Aws_json1_1.ts
index 8b036294e5275..daa41f4eeb4ed 100644
--- a/clients/client-application-auto-scaling/protocols/Aws_json1_1.ts
+++ b/clients/client-application-auto-scaling/protocols/Aws_json1_1.ts
@@ -1544,9 +1544,11 @@ const serializeAws_json1_1MetricDimensions = (
   input: Array<MetricDimension>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MetricDimension(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MetricDimension(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PredefinedMetricSpecification = (
@@ -1675,7 +1677,11 @@ const serializeAws_json1_1ResourceIdsMaxLen1600 = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ScalableTargetAction = (
@@ -1713,9 +1719,11 @@ const serializeAws_json1_1StepAdjustments = (
   input: Array<StepAdjustment>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1StepAdjustment(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1StepAdjustment(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StepScalingPolicyConfiguration = (
diff --git a/clients/client-application-discovery-service/protocols/Aws_json1_1.ts b/clients/client-application-discovery-service/protocols/Aws_json1_1.ts
index 0300743c95649..441df790432ff 100644
--- a/clients/client-application-discovery-service/protocols/Aws_json1_1.ts
+++ b/clients/client-application-discovery-service/protocols/Aws_json1_1.ts
@@ -3426,14 +3426,22 @@ const serializeAws_json1_1AgentIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ApplicationIdsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociateConfigurationItemsToApplicationRequest = (
@@ -3471,14 +3479,22 @@ const serializeAws_json1_1ConfigurationIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContinuousExportIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateApplicationRequest = (
@@ -3650,9 +3666,11 @@ const serializeAws_json1_1DescribeImportTasksFilterList = (
   input: Array<ImportTaskFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ImportTaskFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ImportTaskFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DescribeImportTasksRequest = (
@@ -3716,7 +3734,11 @@ const serializeAws_json1_1ExportDataFormats = (
   input: Array<ExportDataFormat | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ExportFilter = (
@@ -3743,16 +3765,22 @@ const serializeAws_json1_1ExportFilters = (
   input: Array<ExportFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ExportFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ExportFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ExportIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filter = (
@@ -3779,14 +3807,22 @@ const serializeAws_json1_1FilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filters = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetDiscoverySummaryRequest = (
@@ -3818,7 +3854,11 @@ const serializeAws_json1_1ImportTaskFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListConfigurationsRequest = (
@@ -3893,9 +3933,11 @@ const serializeAws_json1_1OrderByList = (
   input: Array<OrderByElement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OrderByElement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OrderByElement(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartContinuousExportRequest = (
@@ -4023,23 +4065,33 @@ const serializeAws_json1_1TagFilters = (
   input: Array<TagFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TagFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TagFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagSet = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ToDeleteIdentifierList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateApplicationRequest = (
diff --git a/clients/client-application-insights/protocols/Aws_json1_1.ts b/clients/client-application-insights/protocols/Aws_json1_1.ts
index 90ac2dadbc0b8..6c9526a13e33f 100644
--- a/clients/client-application-insights/protocols/Aws_json1_1.ts
+++ b/clients/client-application-insights/protocols/Aws_json1_1.ts
@@ -3271,7 +3271,11 @@ const serializeAws_json1_1ResourceList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -3289,14 +3293,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-appstream/protocols/Aws_json1_1.ts b/clients/client-appstream/protocols/Aws_json1_1.ts
index f232499af2d77..95559fccceeb5 100644
--- a/clients/client-appstream/protocols/Aws_json1_1.ts
+++ b/clients/client-appstream/protocols/Aws_json1_1.ts
@@ -5008,9 +5008,11 @@ const serializeAws_json1_1AccessEndpointList = (
   input: Array<AccessEndpoint>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AccessEndpoint(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AccessEndpoint(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ApplicationSettings = (
@@ -5031,7 +5033,11 @@ const serializeAws_json1_1ArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociateFleetRequest = (
@@ -5052,7 +5058,11 @@ const serializeAws_json1_1AwsAccountIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchAssociateUserStackRequest = (
@@ -5683,7 +5693,11 @@ const serializeAws_json1_1DirectoryNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DisableUserRequest = (
@@ -5733,14 +5747,22 @@ const serializeAws_json1_1DomainList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EmbedHostDomains = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EnableUserRequest = (
@@ -5772,7 +5794,11 @@ const serializeAws_json1_1FleetAttributes = (
   input: Array<FleetAttribute | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ImagePermissions = (
@@ -5832,14 +5858,22 @@ const serializeAws_json1_1OrganizationalUnitDistinguishedNamesList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SecurityGroupIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServiceAccountCredentials = (
@@ -5860,7 +5894,11 @@ const serializeAws_json1_1StackAttributes = (
   input: Array<StackAttribute | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartFleetRequest = (
@@ -5934,30 +5972,44 @@ const serializeAws_json1_1StorageConnectorList = (
   input: Array<StorageConnector>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1StorageConnector(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1StorageConnector(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SubnetIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -6199,9 +6251,11 @@ const serializeAws_json1_1UserSettingList = (
   input: Array<UserSetting>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1UserSetting(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1UserSetting(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UserStackAssociation = (
@@ -6228,9 +6282,11 @@ const serializeAws_json1_1UserStackAssociationList = (
   input: Array<UserStackAssociation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1UserStackAssociation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1UserStackAssociation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1VpcConfig = (
diff --git a/clients/client-appsync/protocols/Aws_restJson1_1.ts b/clients/client-appsync/protocols/Aws_restJson1_1.ts
index 0adab61275a29..80d51d391a966 100644
--- a/clients/client-appsync/protocols/Aws_restJson1_1.ts
+++ b/clients/client-appsync/protocols/Aws_restJson1_1.ts
@@ -6212,9 +6212,13 @@ const serializeAws_restJson1_1AdditionalAuthenticationProviders = (
   input: Array<AdditionalAuthenticationProvider>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AdditionalAuthenticationProvider(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1AdditionalAuthenticationProvider(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AuthorizationConfig = (
@@ -6269,7 +6273,11 @@ const serializeAws_restJson1_1CachingKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CognitoUserPoolConfig = (
@@ -6350,7 +6358,11 @@ const serializeAws_restJson1_1FunctionsIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1HttpDataSourceConfig = (
diff --git a/clients/client-athena/protocols/Aws_json1_1.ts b/clients/client-athena/protocols/Aws_json1_1.ts
index bb7e34a75855c..fb32d568b4aa0 100644
--- a/clients/client-athena/protocols/Aws_json1_1.ts
+++ b/clients/client-athena/protocols/Aws_json1_1.ts
@@ -2092,7 +2092,11 @@ const serializeAws_json1_1NamedQueryIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1QueryExecutionContext = (
@@ -2110,7 +2114,11 @@ const serializeAws_json1_1QueryExecutionIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResultConfiguration = (
@@ -2221,14 +2229,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceInput = (
diff --git a/clients/client-auto-scaling-plans/protocols/Aws_json1_1.ts b/clients/client-auto-scaling-plans/protocols/Aws_json1_1.ts
index cd5f6781ae1c9..cc43c12a1a0fa 100644
--- a/clients/client-auto-scaling-plans/protocols/Aws_json1_1.ts
+++ b/clients/client-auto-scaling-plans/protocols/Aws_json1_1.ts
@@ -819,9 +819,11 @@ const serializeAws_json1_1ApplicationSources = (
   input: Array<ApplicationSource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ApplicationSource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ApplicationSource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateScalingPlanRequest = (
@@ -1012,9 +1014,11 @@ const serializeAws_json1_1MetricDimensions = (
   input: Array<MetricDimension>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MetricDimension(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MetricDimension(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PredefinedLoadMetricSpecification = (
@@ -1118,16 +1122,22 @@ const serializeAws_json1_1ScalingInstructions = (
   input: Array<ScalingInstruction>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ScalingInstruction(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ScalingInstruction(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ScalingPlanNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagFilter = (
@@ -1148,16 +1158,22 @@ const serializeAws_json1_1TagFilters = (
   input: Array<TagFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TagFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TagFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetTrackingConfiguration = (
@@ -1203,9 +1219,13 @@ const serializeAws_json1_1TargetTrackingConfigurations = (
   input: Array<TargetTrackingConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TargetTrackingConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1TargetTrackingConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateScalingPlanRequest = (
diff --git a/clients/client-auto-scaling/protocols/Aws_query.ts b/clients/client-auto-scaling/protocols/Aws_query.ts
index 64b7ff7aedccb..de1ee48ab3b60 100644
--- a/clients/client-auto-scaling/protocols/Aws_query.ts
+++ b/clients/client-auto-scaling/protocols/Aws_query.ts
@@ -5065,10 +5065,10 @@ const serializeAws_queryActivityIds = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5141,10 +5141,10 @@ const serializeAws_queryAutoScalingGroupNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5178,10 +5178,10 @@ const serializeAws_queryAutoScalingNotificationTypes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5191,10 +5191,10 @@ const serializeAws_queryAvailabilityZones = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5270,13 +5270,13 @@ const serializeAws_queryBlockDeviceMappings = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryBlockDeviceMapping(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5286,10 +5286,10 @@ const serializeAws_queryClassicLinkVPCSecurityGroups = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6107,13 +6107,13 @@ const serializeAws_queryFilters = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryFilter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6123,10 +6123,10 @@ const serializeAws_queryInstanceIds = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6185,10 +6185,10 @@ const serializeAws_queryLaunchConfigurationNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6278,10 +6278,10 @@ const serializeAws_queryLifecycleHookNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6320,7 +6320,7 @@ const serializeAws_queryLifecycleHookSpecifications = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryLifecycleHookSpecification(
       entry,
       context
@@ -6329,7 +6329,7 @@ const serializeAws_queryLifecycleHookSpecifications = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6339,10 +6339,10 @@ const serializeAws_queryLoadBalancerNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6366,13 +6366,13 @@ const serializeAws_queryMetricDimensions = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryMetricDimension(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6382,10 +6382,10 @@ const serializeAws_queryMetrics = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6423,7 +6423,7 @@ const serializeAws_queryOverrides = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryLaunchTemplateOverrides(
       entry,
       context
@@ -6432,7 +6432,7 @@ const serializeAws_queryOverrides = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6442,10 +6442,10 @@ const serializeAws_queryPolicyNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6455,10 +6455,10 @@ const serializeAws_queryPolicyTypes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6482,10 +6482,10 @@ const serializeAws_queryProcessNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6685,10 +6685,10 @@ const serializeAws_queryScheduledActionNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6727,7 +6727,7 @@ const serializeAws_queryScheduledUpdateGroupActionRequests = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryScheduledUpdateGroupActionRequest(
       entry,
       context
@@ -6736,7 +6736,7 @@ const serializeAws_queryScheduledUpdateGroupActionRequests = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6746,10 +6746,10 @@ const serializeAws_querySecurityGroups = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6834,13 +6834,13 @@ const serializeAws_queryStepAdjustments = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryStepAdjustment(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6870,13 +6870,13 @@ const serializeAws_queryTags = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6886,10 +6886,10 @@ const serializeAws_queryTargetGroupARNs = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6948,10 +6948,10 @@ const serializeAws_queryTerminationPolicies = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7049,10 +7049,10 @@ const serializeAws_queryValues = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-backup/protocols/Aws_restJson1_1.ts b/clients/client-backup/protocols/Aws_restJson1_1.ts
index 062ee3610e310..0c73d19b61cdb 100644
--- a/clients/client-backup/protocols/Aws_restJson1_1.ts
+++ b/clients/client-backup/protocols/Aws_restJson1_1.ts
@@ -6751,9 +6751,11 @@ const serializeAws_restJson1_1BackupRulesInput = (
   input: Array<BackupRuleInput>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1BackupRuleInput(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1BackupRuleInput(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1BackupSelection = (
@@ -6786,7 +6788,11 @@ const serializeAws_restJson1_1BackupVaultEvents = (
   input: Array<BackupVaultEvent | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Condition = (
@@ -6827,9 +6833,11 @@ const serializeAws_restJson1_1CopyActions = (
   input: Array<CopyAction>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CopyAction(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CopyAction(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Lifecycle = (
@@ -6850,9 +6858,11 @@ const serializeAws_restJson1_1ListOfTags = (
   input: Array<Condition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Condition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Condition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Metadata = (
@@ -6870,14 +6880,22 @@ const serializeAws_restJson1_1ResourceArns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tags = (
diff --git a/clients/client-batch/protocols/Aws_restJson1_1.ts b/clients/client-batch/protocols/Aws_restJson1_1.ts
index 94bfb9ab68b9d..2544d2113bd62 100644
--- a/clients/client-batch/protocols/Aws_restJson1_1.ts
+++ b/clients/client-batch/protocols/Aws_restJson1_1.ts
@@ -1885,9 +1885,13 @@ const serializeAws_restJson1_1ComputeEnvironmentOrders = (
   input: Array<ComputeEnvironmentOrder>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ComputeEnvironmentOrder(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1ComputeEnvironmentOrder(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ComputeResource = (
@@ -2114,25 +2118,33 @@ const serializeAws_restJson1_1DeviceCgroupPermissions = (
   input: Array<DeviceCgroupPermission | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DevicesList = (
   input: Array<Device>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Device(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Device(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1EnvironmentVariables = (
   input: Array<KeyValuePair>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1KeyValuePair(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1KeyValuePair(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Host = (
@@ -2164,9 +2176,11 @@ const serializeAws_restJson1_1JobDependencyList = (
   input: Array<JobDependency>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1JobDependency(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1JobDependency(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1JobTimeout = (
@@ -2246,9 +2260,11 @@ const serializeAws_restJson1_1MountPoints = (
   input: Array<MountPoint>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MountPoint(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1MountPoint(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1NodeOverrides = (
@@ -2315,18 +2331,22 @@ const serializeAws_restJson1_1NodePropertyOverrides = (
   input: Array<NodePropertyOverride>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1NodePropertyOverride(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1NodePropertyOverride(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1NodeRangeProperties = (
   input: Array<NodeRangeProperty>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1NodeRangeProperty(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1NodeRangeProperty(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1NodeRangeProperty = (
@@ -2375,9 +2395,11 @@ const serializeAws_restJson1_1ResourceRequirements = (
   input: Array<ResourceRequirement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ResourceRequirement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ResourceRequirement(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1RetryStrategy = (
@@ -2395,7 +2417,11 @@ const serializeAws_restJson1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagsMap = (
@@ -2430,9 +2456,11 @@ const serializeAws_restJson1_1Ulimits = (
   input: Array<Ulimit>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Ulimit(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Ulimit(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Volume = (
@@ -2453,9 +2481,11 @@ const serializeAws_restJson1_1Volumes = (
   input: Array<Volume>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Volume(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Volume(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ArrayJobStatusSummary = (
diff --git a/clients/client-budgets/protocols/Aws_json1_1.ts b/clients/client-budgets/protocols/Aws_json1_1.ts
index 13bb38044fcc3..9df4348c82da4 100644
--- a/clients/client-budgets/protocols/Aws_json1_1.ts
+++ b/clients/client-budgets/protocols/Aws_json1_1.ts
@@ -2255,7 +2255,11 @@ const serializeAws_json1_1DimensionValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Notification = (
@@ -2305,9 +2309,13 @@ const serializeAws_json1_1NotificationWithSubscribersList = (
   input: Array<NotificationWithSubscribers>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1NotificationWithSubscribers(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1NotificationWithSubscribers(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PlannedBudgetLimits = (
@@ -2353,9 +2361,11 @@ const serializeAws_json1_1Subscribers = (
   input: Array<Subscriber>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Subscriber(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Subscriber(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TimePeriod = (
diff --git a/clients/client-chime/protocols/Aws_restJson1_1.ts b/clients/client-chime/protocols/Aws_restJson1_1.ts
index e34ce6241568e..319f8ed9817ae 100644
--- a/clients/client-chime/protocols/Aws_restJson1_1.ts
+++ b/clients/client-chime/protocols/Aws_restJson1_1.ts
@@ -15652,7 +15652,11 @@ const serializeAws_restJson1_1CallingRegionList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CreateAttendeeRequestItem = (
@@ -15670,9 +15674,13 @@ const serializeAws_restJson1_1CreateAttendeeRequestItemList = (
   input: Array<CreateAttendeeRequestItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CreateAttendeeRequestItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1CreateAttendeeRequestItem(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Credential = (
@@ -15693,16 +15701,22 @@ const serializeAws_restJson1_1CredentialList = (
   input: Array<Credential>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Credential(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Credential(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1E164PhoneNumberList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LoggingConfiguration = (
@@ -15748,16 +15762,22 @@ const serializeAws_restJson1_1MembershipItemList = (
   input: Array<MembershipItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MembershipItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1MembershipItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1NonEmptyStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Origination = (
@@ -15804,16 +15824,22 @@ const serializeAws_restJson1_1OriginationRouteList = (
   input: Array<OriginationRoute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1OriginationRoute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1OriginationRoute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SensitiveStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SigninDelegateGroup = (
@@ -15831,9 +15857,11 @@ const serializeAws_restJson1_1SigninDelegateGroupList = (
   input: Array<SigninDelegateGroup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SigninDelegateGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SigninDelegateGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StreamingConfiguration = (
@@ -15854,7 +15882,11 @@ const serializeAws_restJson1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TelephonySettings = (
@@ -15924,9 +15956,13 @@ const serializeAws_restJson1_1UpdatePhoneNumberRequestItemList = (
   input: Array<UpdatePhoneNumberRequestItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1UpdatePhoneNumberRequestItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1UpdatePhoneNumberRequestItem(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1UpdateUserRequestItem = (
@@ -15958,23 +15994,35 @@ const serializeAws_restJson1_1UpdateUserRequestItemList = (
   input: Array<UpdateUserRequestItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1UpdateUserRequestItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1UpdateUserRequestItem(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1UserEmailList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1UserIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1UserSettings = (
@@ -16009,9 +16057,11 @@ const serializeAws_restJson1_1VoiceConnectorItemList = (
   input: Array<VoiceConnectorItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1VoiceConnectorItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1VoiceConnectorItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1VoiceConnectorSettings = (
diff --git a/clients/client-cloud9/protocols/Aws_json1_1.ts b/clients/client-cloud9/protocols/Aws_json1_1.ts
index a11b6efc9ec8f..8df38736c54b2 100644
--- a/clients/client-cloud9/protocols/Aws_json1_1.ts
+++ b/clients/client-cloud9/protocols/Aws_json1_1.ts
@@ -1590,7 +1590,11 @@ const serializeAws_json1_1BoundedEnvironmentIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateEnvironmentEC2Request = (
@@ -1733,7 +1737,11 @@ const serializeAws_json1_1PermissionsList = (
   input: Array<Permissions | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateEnvironmentMembershipRequest = (
diff --git a/clients/client-clouddirectory/protocols/Aws_restJson1_1.ts b/clients/client-clouddirectory/protocols/Aws_restJson1_1.ts
index 15969968d6fd6..0d7fd0601f3af 100644
--- a/clients/client-clouddirectory/protocols/Aws_restJson1_1.ts
+++ b/clients/client-clouddirectory/protocols/Aws_restJson1_1.ts
@@ -12379,18 +12379,22 @@ const serializeAws_restJson1_1AttributeKeyAndValueList = (
   input: Array<AttributeKeyAndValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AttributeKeyAndValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AttributeKeyAndValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AttributeKeyList = (
   input: Array<AttributeKey>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AttributeKey(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AttributeKey(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AttributeNameAndValue = (
@@ -12414,16 +12418,24 @@ const serializeAws_restJson1_1AttributeNameAndValueList = (
   input: Array<AttributeNameAndValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AttributeNameAndValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1AttributeNameAndValue(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AttributeNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1BatchAddFacetToObject = (
@@ -13160,9 +13172,11 @@ const serializeAws_restJson1_1BatchReadOperationList = (
   input: Array<BatchReadOperation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1BatchReadOperation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1BatchReadOperation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1BatchRemoveFacetFromObject = (
@@ -13347,9 +13361,11 @@ const serializeAws_restJson1_1BatchWriteOperationList = (
   input: Array<BatchWriteOperation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1BatchWriteOperation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1BatchWriteOperation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FacetAttribute = (
@@ -13409,9 +13425,11 @@ const serializeAws_restJson1_1FacetAttributeList = (
   input: Array<FacetAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1FacetAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1FacetAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FacetAttributeReference = (
@@ -13449,9 +13467,11 @@ const serializeAws_restJson1_1FacetAttributeUpdateList = (
   input: Array<FacetAttributeUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1FacetAttributeUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1FacetAttributeUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LinkAttributeAction = (
@@ -13497,9 +13517,11 @@ const serializeAws_restJson1_1LinkAttributeUpdateList = (
   input: Array<LinkAttributeUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1LinkAttributeUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1LinkAttributeUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ObjectAttributeAction = (
@@ -13545,9 +13567,11 @@ const serializeAws_restJson1_1ObjectAttributeRangeList = (
   input: Array<ObjectAttributeRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ObjectAttributeRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ObjectAttributeRange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ObjectAttributeUpdate = (
@@ -13576,9 +13600,13 @@ const serializeAws_restJson1_1ObjectAttributeUpdateList = (
   input: Array<ObjectAttributeUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ObjectAttributeUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1ObjectAttributeUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ObjectReference = (
@@ -13649,9 +13677,11 @@ const serializeAws_restJson1_1SchemaFacetList = (
   input: Array<SchemaFacet>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SchemaFacet(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SchemaFacet(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tag = (
@@ -13672,16 +13702,22 @@ const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TypedAttributeValue = (
@@ -13768,9 +13804,13 @@ const serializeAws_restJson1_1TypedLinkAttributeDefinitionList = (
   input: Array<TypedLinkAttributeDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TypedLinkAttributeDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1TypedLinkAttributeDefinition(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TypedLinkAttributeRange = (
@@ -13794,9 +13834,13 @@ const serializeAws_restJson1_1TypedLinkAttributeRangeList = (
   input: Array<TypedLinkAttributeRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TypedLinkAttributeRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1TypedLinkAttributeRange(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TypedLinkFacet = (
@@ -13849,9 +13893,13 @@ const serializeAws_restJson1_1TypedLinkFacetAttributeUpdateList = (
   input: Array<TypedLinkFacetAttributeUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TypedLinkFacetAttributeUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1TypedLinkFacetAttributeUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TypedLinkSchemaAndFacetName = (
diff --git a/clients/client-cloudformation/protocols/Aws_query.ts b/clients/client-cloudformation/protocols/Aws_query.ts
index 5ab6b31d342ca..5e0bcf7a40886 100644
--- a/clients/client-cloudformation/protocols/Aws_query.ts
+++ b/clients/client-cloudformation/protocols/Aws_query.ts
@@ -5290,10 +5290,10 @@ const serializeAws_queryCapabilities = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6034,10 +6034,10 @@ const serializeAws_queryLogicalResourceIds = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6047,10 +6047,10 @@ const serializeAws_queryNotificationARNs = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6080,13 +6080,13 @@ const serializeAws_queryParameters = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryParameter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6196,10 +6196,10 @@ const serializeAws_queryResourceTypes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6209,13 +6209,13 @@ const serializeAws_queryResourcesToImport = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryResourceToImport(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6225,10 +6225,10 @@ const serializeAws_queryResourcesToSkip = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6238,10 +6238,10 @@ const serializeAws_queryRetainResources = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6286,13 +6286,13 @@ const serializeAws_queryRollbackTriggers = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryRollbackTrigger(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6359,10 +6359,10 @@ const serializeAws_queryStackResourceDriftStatusFilters = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6372,10 +6372,10 @@ const serializeAws_queryStackStatusFilter = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6396,13 +6396,13 @@ const serializeAws_queryTags = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6535,10 +6535,10 @@ const serializeAws_queryAccountList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6865,10 +6865,10 @@ const serializeAws_queryRegionList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-cloudfront/protocols/Aws_restXml.ts b/clients/client-cloudfront/protocols/Aws_restXml.ts
index d974914e293d2..80994a1baba4a 100644
--- a/clients/client-cloudfront/protocols/Aws_restXml.ts
+++ b/clients/client-cloudfront/protocols/Aws_restXml.ts
@@ -8811,10 +8811,10 @@ const serializeAws_restXmlAliasList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("string").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("CNAME"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8874,10 +8874,10 @@ const serializeAws_restXmlAwsAccountNumberList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("string").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("AwsAccountNumber"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8976,10 +8976,10 @@ const serializeAws_restXmlCacheBehaviorList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlCacheBehavior(entry, context);
     collectedNodes.push(node.withName("CacheBehavior"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9101,10 +9101,10 @@ const serializeAws_restXmlContentTypeProfileList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlContentTypeProfile(entry, context);
     collectedNodes.push(node.withName("ContentTypeProfile"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9138,10 +9138,10 @@ const serializeAws_restXmlCookieNameList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("string").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("Name"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9225,10 +9225,10 @@ const serializeAws_restXmlCustomErrorResponseList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlCustomErrorResponse(entry, context);
     collectedNodes.push(node.withName("CustomErrorResponse"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9600,10 +9600,10 @@ const serializeAws_restXmlEncryptionEntityList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlEncryptionEntity(entry, context);
     collectedNodes.push(node.withName("EncryptionEntity"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9679,10 +9679,10 @@ const serializeAws_restXmlFieldPatternList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("string").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("FieldPattern"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9773,10 +9773,10 @@ const serializeAws_restXmlHeaderList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("string").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("Name"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9851,10 +9851,10 @@ const serializeAws_restXmlLambdaFunctionAssociationList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlLambdaFunctionAssociation(entry, context);
     collectedNodes.push(node.withName("LambdaFunctionAssociation"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9888,10 +9888,10 @@ const serializeAws_restXmlLocationList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("string").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("Location"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -9932,10 +9932,10 @@ const serializeAws_restXmlMethodsList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("Method").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("Method"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10011,10 +10011,10 @@ const serializeAws_restXmlOriginCustomHeadersList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlOriginCustomHeader(entry, context);
     collectedNodes.push(node.withName("OriginCustomHeader"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10066,10 +10066,10 @@ const serializeAws_restXmlOriginGroupList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlOriginGroup(entry, context);
     collectedNodes.push(node.withName("OriginGroup"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10092,10 +10092,10 @@ const serializeAws_restXmlOriginGroupMemberList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlOriginGroupMember(entry, context);
     collectedNodes.push(node.withName("OriginGroupMember"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10151,10 +10151,10 @@ const serializeAws_restXmlOriginList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlOrigin(entry, context);
     collectedNodes.push(node.withName("Origin"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10207,10 +10207,10 @@ const serializeAws_restXmlPathList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("string").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("Path"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10316,10 +10316,10 @@ const serializeAws_restXmlQueryArgProfileList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlQueryArgProfile(entry, context);
     collectedNodes.push(node.withName("QueryArgProfile"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10375,10 +10375,10 @@ const serializeAws_restXmlQueryStringCacheKeysList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("string").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("Name"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10436,12 +10436,12 @@ const serializeAws_restXmlSslProtocolsList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("SslProtocol").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("SslProtocol"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10450,12 +10450,12 @@ const serializeAws_restXmlStatusCodeList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("integer").addChildNode(
       new __XmlText(String(entry))
     );
     collectedNodes.push(node.withName("StatusCode"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10602,10 +10602,10 @@ const serializeAws_restXmlTagKeyList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("TagKey").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("Key"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10630,10 +10630,10 @@ const serializeAws_restXmlTagList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlTag(entry, context);
     collectedNodes.push(node.withName("Tag"));
-  });
+  }
   return collectedNodes;
 };
 
diff --git a/clients/client-cloudhsm-v2/protocols/Aws_json1_1.ts b/clients/client-cloudhsm-v2/protocols/Aws_json1_1.ts
index 96e8ea6f7328c..2caa7535e9976 100644
--- a/clients/client-cloudhsm-v2/protocols/Aws_json1_1.ts
+++ b/clients/client-cloudhsm-v2/protocols/Aws_json1_1.ts
@@ -1941,14 +1941,22 @@ const serializeAws_json1_1Strings = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SubnetIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -1966,14 +1974,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-cloudhsm/protocols/Aws_json1_1.ts b/clients/client-cloudhsm/protocols/Aws_json1_1.ts
index 6163da547d391..379ca3181b96f 100644
--- a/clients/client-cloudhsm/protocols/Aws_json1_1.ts
+++ b/clients/client-cloudhsm/protocols/Aws_json1_1.ts
@@ -2193,7 +2193,11 @@ const serializeAws_json1_1HapgList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListAvailableZonesRequest = (
@@ -2312,7 +2316,11 @@ const serializeAws_json1_1PartitionSerialList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RemoveTagsFromResourceRequest = (
@@ -2347,14 +2355,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AZList = (
diff --git a/clients/client-cloudsearch/protocols/Aws_query.ts b/clients/client-cloudsearch/protocols/Aws_query.ts
index 88785d50af5bc..c0ac6ffd65856 100644
--- a/clients/client-cloudsearch/protocols/Aws_query.ts
+++ b/clients/client-cloudsearch/protocols/Aws_query.ts
@@ -3636,10 +3636,10 @@ const serializeAws_queryDomainNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3698,10 +3698,10 @@ const serializeAws_queryDynamicFieldNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4001,10 +4001,10 @@ const serializeAws_queryStandardNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4848,8 +4848,8 @@ const deserializeAws_queryDomainNameMap = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
diff --git a/clients/client-cloudtrail/protocols/Aws_json1_1.ts b/clients/client-cloudtrail/protocols/Aws_json1_1.ts
index cd1f2e3e7b07c..01f2e7984d3db 100644
--- a/clients/client-cloudtrail/protocols/Aws_json1_1.ts
+++ b/clients/client-cloudtrail/protocols/Aws_json1_1.ts
@@ -3624,16 +3624,22 @@ const serializeAws_json1_1DataResourceValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DataResources = (
   input: Array<DataResource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DataResource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DataResource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteTrailRequest = (
@@ -3696,16 +3702,22 @@ const serializeAws_json1_1EventSelectors = (
   input: Array<EventSelector>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EventSelector(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EventSelector(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ExcludeManagementEventSources = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetEventSelectorsRequest = (
@@ -3767,9 +3779,11 @@ const serializeAws_json1_1InsightSelectors = (
   input: Array<InsightSelector>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InsightSelector(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InsightSelector(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListPublicKeysRequest = (
@@ -3835,9 +3849,11 @@ const serializeAws_json1_1LookupAttributesList = (
   input: Array<LookupAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1LookupAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1LookupAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LookupEventsRequest = (
@@ -3924,7 +3940,11 @@ const serializeAws_json1_1ResourceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartLoggingRequest = (
@@ -3964,14 +3984,22 @@ const serializeAws_json1_1TagsList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TrailNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateTrailRequest = (
diff --git a/clients/client-cloudwatch-events/protocols/Aws_json1_1.ts b/clients/client-cloudwatch-events/protocols/Aws_json1_1.ts
index 05de208e42edc..94728fec1ef55 100644
--- a/clients/client-cloudwatch-events/protocols/Aws_json1_1.ts
+++ b/clients/client-cloudwatch-events/protocols/Aws_json1_1.ts
@@ -3469,7 +3469,11 @@ const serializeAws_json1_1EventResourceList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InputTransformer = (
@@ -3700,9 +3704,11 @@ const serializeAws_json1_1PutEventsRequestEntryList = (
   input: Array<PutEventsRequestEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PutEventsRequestEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PutEventsRequestEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutPartnerEventsRequest = (
@@ -3751,9 +3757,13 @@ const serializeAws_json1_1PutPartnerEventsRequestEntryList = (
   input: Array<PutPartnerEventsRequestEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PutPartnerEventsRequestEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1PutPartnerEventsRequestEntry(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutPermissionRequest = (
@@ -3903,16 +3913,22 @@ const serializeAws_json1_1RunCommandTargetValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RunCommandTargets = (
   input: Array<RunCommandTarget>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RunCommandTarget(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RunCommandTarget(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SqsParameters = (
@@ -3930,7 +3946,11 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -3948,14 +3968,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -4037,14 +4065,22 @@ const serializeAws_json1_1TargetIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetList = (
   input: Array<Target>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Target(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Target(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TestEventPatternRequest = (
diff --git a/clients/client-cloudwatch-logs/protocols/Aws_json1_1.ts b/clients/client-cloudwatch-logs/protocols/Aws_json1_1.ts
index 1d720d092e579..2c5ab59987d6c 100644
--- a/clients/client-cloudwatch-logs/protocols/Aws_json1_1.ts
+++ b/clients/client-cloudwatch-logs/protocols/Aws_json1_1.ts
@@ -4700,16 +4700,22 @@ const serializeAws_json1_1InputLogEvents = (
   input: Array<InputLogEvent>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InputLogEvent(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InputLogEvent(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InputLogStreamNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListTagsLogGroupRequest = (
@@ -4727,7 +4733,11 @@ const serializeAws_json1_1LogGroupNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MetricTransformation = (
@@ -4754,9 +4764,11 @@ const serializeAws_json1_1MetricTransformations = (
   input: Array<MetricTransformation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MetricTransformation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MetricTransformation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutDestinationPolicyRequest = (
@@ -4936,7 +4948,11 @@ const serializeAws_json1_1TagList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagLogGroupRequest = (
@@ -4968,7 +4984,11 @@ const serializeAws_json1_1TestEventMessages = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TestMetricFilterRequest = (
diff --git a/clients/client-cloudwatch/protocols/Aws_query.ts b/clients/client-cloudwatch/protocols/Aws_query.ts
index 6ecb57aa2e9bc..01ffa39e1e0a2 100644
--- a/clients/client-cloudwatch/protocols/Aws_query.ts
+++ b/clients/client-cloudwatch/protocols/Aws_query.ts
@@ -3020,10 +3020,10 @@ const serializeAws_queryAlarmNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3054,13 +3054,13 @@ const serializeAws_queryAnomalyDetectorExcludedTimeRanges = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryRange(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3070,10 +3070,10 @@ const serializeAws_queryCounts = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3083,10 +3083,10 @@ const serializeAws_queryDashboardNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3344,13 +3344,13 @@ const serializeAws_queryDimensionFilters = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryDimensionFilter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3360,13 +3360,13 @@ const serializeAws_queryDimensions = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryDimension(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3448,10 +3448,10 @@ const serializeAws_queryExtendedStatistics = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3611,10 +3611,10 @@ const serializeAws_queryInsightRuleMetricList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3624,10 +3624,10 @@ const serializeAws_queryInsightRuleNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3713,13 +3713,13 @@ const serializeAws_queryMetricData = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryMetricDatum(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3729,13 +3729,13 @@ const serializeAws_queryMetricDataQueries = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryMetricDataQuery(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4076,10 +4076,10 @@ const serializeAws_queryResourceList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4129,10 +4129,10 @@ const serializeAws_queryStatistics = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4153,10 +4153,10 @@ const serializeAws_queryTagKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4166,13 +4166,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4218,10 +4218,10 @@ const serializeAws_queryValues = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4592,8 +4592,8 @@ const deserializeAws_queryDatapointValueMap = (
   context: __SerdeContext
 ): { [key: string]: number } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = parseFloat(output[key]);
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = parseFloat(pair["value"]);
   });
   return mapParams;
 };
diff --git a/clients/client-codebuild/protocols/Aws_json1_1.ts b/clients/client-codebuild/protocols/Aws_json1_1.ts
index a152310e33d36..3803e29adcb00 100644
--- a/clients/client-codebuild/protocols/Aws_json1_1.ts
+++ b/clients/client-codebuild/protocols/Aws_json1_1.ts
@@ -3146,7 +3146,11 @@ const serializeAws_json1_1BuildIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CloudWatchLogsConfig = (
@@ -3407,27 +3411,33 @@ const serializeAws_json1_1EnvironmentVariables = (
   input: Array<EnvironmentVariable>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EnvironmentVariable(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EnvironmentVariable(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FilterGroup = (
   input: Array<WebhookFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1WebhookFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1WebhookFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FilterGroups = (
   input: Array<Array<WebhookFilter>>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1FilterGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1FilterGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetResourcePolicyInput = (
@@ -3718,9 +3728,11 @@ const serializeAws_json1_1ProjectArtifactsList = (
   input: Array<ProjectArtifacts>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProjectArtifacts(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProjectArtifacts(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProjectCache = (
@@ -3747,7 +3759,11 @@ const serializeAws_json1_1ProjectCacheModes = (
   input: Array<CacheMode | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProjectEnvironment = (
@@ -3794,16 +3810,22 @@ const serializeAws_json1_1ProjectNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProjectSecondarySourceVersions = (
   input: Array<ProjectSourceVersion>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProjectSourceVersion(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProjectSourceVersion(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProjectSource = (
@@ -3862,9 +3884,11 @@ const serializeAws_json1_1ProjectSources = (
   input: Array<ProjectSource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProjectSource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProjectSource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutResourcePolicyInput = (
@@ -3899,7 +3923,11 @@ const serializeAws_json1_1ReportArns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ReportExportConfig = (
@@ -3934,7 +3962,11 @@ const serializeAws_json1_1ReportGroupArns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1S3LogsConfig = (
@@ -3981,7 +4013,11 @@ const serializeAws_json1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SourceAuth = (
@@ -4150,7 +4186,11 @@ const serializeAws_json1_1Subnets = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -4168,7 +4208,11 @@ const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TestCaseFilter = (
diff --git a/clients/client-codecommit/protocols/Aws_json1_1.ts b/clients/client-codecommit/protocols/Aws_json1_1.ts
index c57965349bb05..69c72e50c3c29 100644
--- a/clients/client-codecommit/protocols/Aws_json1_1.ts
+++ b/clients/client-codecommit/protocols/Aws_json1_1.ts
@@ -19498,14 +19498,22 @@ const serializeAws_json1_1BranchNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CommitIdsInputList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConflictResolution = (
@@ -19761,9 +19769,11 @@ const serializeAws_json1_1DeleteFileEntries = (
   input: Array<DeleteFileEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DeleteFileEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DeleteFileEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteFileEntry = (
@@ -19924,7 +19934,11 @@ const serializeAws_json1_1FilePaths = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetApprovalRuleTemplateInput = (
@@ -20690,9 +20704,11 @@ const serializeAws_json1_1PutFileEntries = (
   input: Array<PutFileEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PutFileEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PutFileEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutFileEntry = (
@@ -20774,9 +20790,11 @@ const serializeAws_json1_1ReplaceContentEntries = (
   input: Array<ReplaceContentEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ReplaceContentEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ReplaceContentEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ReplaceContentEntry = (
@@ -20803,7 +20821,11 @@ const serializeAws_json1_1RepositoryNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RepositoryTrigger = (
@@ -20839,25 +20861,33 @@ const serializeAws_json1_1RepositoryTriggerEventList = (
   input: Array<RepositoryTriggerEventEnum | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RepositoryTriggersList = (
   input: Array<RepositoryTrigger>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RepositoryTrigger(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RepositoryTrigger(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SetFileModeEntries = (
   input: Array<SetFileModeEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SetFileModeEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SetFileModeEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SetFileModeEntry = (
@@ -20892,7 +20922,11 @@ const serializeAws_json1_1TagKeysList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceInput = (
@@ -20941,7 +20975,11 @@ const serializeAws_json1_1TargetList = (
   input: Array<Target>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Target(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Target(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TestRepositoryTriggersInput = (
diff --git a/clients/client-codedeploy/protocols/Aws_json1_1.ts b/clients/client-codedeploy/protocols/Aws_json1_1.ts
index 3ce898bc49dac..85c189dae5851 100644
--- a/clients/client-codedeploy/protocols/Aws_json1_1.ts
+++ b/clients/client-codedeploy/protocols/Aws_json1_1.ts
@@ -8667,7 +8667,11 @@ const serializeAws_json1_1AlarmList = (
   input: Array<Alarm>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Alarm(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Alarm(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AppSpecContent = (
@@ -8688,7 +8692,11 @@ const serializeAws_json1_1ApplicationsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutoRollbackConfiguration = (
@@ -8712,14 +8720,22 @@ const serializeAws_json1_1AutoRollbackEventsList = (
   input: Array<AutoRollbackEvent | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutoScalingGroupNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchGetApplicationRevisionsInput = (
@@ -9145,7 +9161,11 @@ const serializeAws_json1_1DeploymentGroupsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeploymentReadyOption = (
@@ -9166,7 +9186,11 @@ const serializeAws_json1_1DeploymentStatusList = (
   input: Array<DeploymentStatus | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeploymentStyle = (
@@ -9187,7 +9211,11 @@ const serializeAws_json1_1DeploymentsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeregisterOnPremisesInstanceInput = (
@@ -9222,9 +9250,11 @@ const serializeAws_json1_1EC2TagFilterList = (
   input: Array<EC2TagFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EC2TagFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EC2TagFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EC2TagSet = (
@@ -9245,9 +9275,11 @@ const serializeAws_json1_1EC2TagSetList = (
   input: Array<Array<EC2TagFilter>>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EC2TagFilterList(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EC2TagFilterList(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ECSService = (
@@ -9268,9 +9300,11 @@ const serializeAws_json1_1ECSServiceList = (
   input: Array<ECSService>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ECSService(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ECSService(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ELBInfo = (
@@ -9288,16 +9322,22 @@ const serializeAws_json1_1ELBInfoList = (
   input: Array<ELBInfo>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ELBInfo(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ELBInfo(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetApplicationInput = (
@@ -9432,28 +9472,44 @@ const serializeAws_json1_1InstanceNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceStatusList = (
   input: Array<InstanceStatus | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceTypeList = (
   input: Array<_InstanceType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstancesList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListApplicationRevisionsInput = (
@@ -9647,7 +9703,11 @@ const serializeAws_json1_1ListenerArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LoadBalancerInfo = (
@@ -9712,9 +9772,11 @@ const serializeAws_json1_1OnPremisesTagSetList = (
   input: Array<Array<TagFilter>>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TagFilterList(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TagFilterList(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutLifecycleEventHookExecutionStatusInput = (
@@ -9839,9 +9901,11 @@ const serializeAws_json1_1RevisionLocationList = (
   input: Array<RevisionLocation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RevisionLocation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RevisionLocation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1S3Location = (
@@ -9924,23 +9988,33 @@ const serializeAws_json1_1TagFilterList = (
   input: Array<TagFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TagFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TagFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceInput = (
@@ -9983,9 +10057,11 @@ const serializeAws_json1_1TargetGroupInfoList = (
   input: Array<TargetGroupInfo>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TargetGroupInfo(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TargetGroupInfo(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetGroupPairInfo = (
@@ -10018,16 +10094,22 @@ const serializeAws_json1_1TargetGroupPairInfoList = (
   input: Array<TargetGroupPairInfo>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TargetGroupPairInfo(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TargetGroupPairInfo(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetInstances = (
@@ -10161,16 +10243,22 @@ const serializeAws_json1_1TriggerConfigList = (
   input: Array<TriggerConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TriggerConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TriggerConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TriggerEventTypeList = (
   input: Array<TriggerEventType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceInput = (
diff --git a/clients/client-codepipeline/protocols/Aws_json1_1.ts b/clients/client-codepipeline/protocols/Aws_json1_1.ts
index fae241ceaaee7..0cc42f0fdebc8 100644
--- a/clients/client-codepipeline/protocols/Aws_json1_1.ts
+++ b/clients/client-codepipeline/protocols/Aws_json1_1.ts
@@ -4690,9 +4690,13 @@ const serializeAws_json1_1ActionConfigurationPropertyList = (
   input: Array<ActionConfigurationProperty>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ActionConfigurationProperty(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ActionConfigurationProperty(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ActionDeclaration = (
@@ -5092,9 +5096,11 @@ const serializeAws_json1_1InputArtifactList = (
   input: Array<InputArtifact>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InputArtifact(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InputArtifact(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListActionExecutionsInput = (
@@ -5208,9 +5214,11 @@ const serializeAws_json1_1OutputArtifactList = (
   input: Array<OutputArtifact>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OutputArtifact(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OutputArtifact(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PipelineDeclaration = (
@@ -5252,9 +5260,11 @@ const serializeAws_json1_1PipelineStageDeclarationList = (
   input: Array<StageDeclaration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1StageDeclaration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1StageDeclaration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PollForJobsInput = (
@@ -5496,18 +5506,22 @@ const serializeAws_json1_1StageActionDeclarationList = (
   input: Array<ActionDeclaration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ActionDeclaration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ActionDeclaration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StageBlockerDeclarationList = (
   input: Array<BlockerDeclaration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1BlockerDeclaration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1BlockerDeclaration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StageDeclaration = (
@@ -5585,14 +5599,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceInput = (
@@ -5706,9 +5728,11 @@ const serializeAws_json1_1WebhookFilters = (
   input: Array<WebhookFilterRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1WebhookFilterRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1WebhookFilterRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ActionConfigurationMap = (
diff --git a/clients/client-codestar-notifications/protocols/Aws_restJson1_1.ts b/clients/client-codestar-notifications/protocols/Aws_restJson1_1.ts
index 0bd064b82fcd0..c905efcbc197d 100644
--- a/clients/client-codestar-notifications/protocols/Aws_restJson1_1.ts
+++ b/clients/client-codestar-notifications/protocols/Aws_restJson1_1.ts
@@ -1614,7 +1614,11 @@ const serializeAws_restJson1_1EventTypeIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListEventTypesFilter = (
@@ -1635,9 +1639,11 @@ const serializeAws_restJson1_1ListEventTypesFilters = (
   input: Array<ListEventTypesFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ListEventTypesFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ListEventTypesFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListNotificationRulesFilter = (
@@ -1658,9 +1664,13 @@ const serializeAws_restJson1_1ListNotificationRulesFilters = (
   input: Array<ListNotificationRulesFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ListNotificationRulesFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1ListNotificationRulesFilter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListTargetsFilter = (
@@ -1681,16 +1691,22 @@ const serializeAws_restJson1_1ListTargetsFilters = (
   input: Array<ListTargetsFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ListTargetsFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ListTargetsFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tags = (
@@ -1722,9 +1738,11 @@ const serializeAws_restJson1_1Targets = (
   input: Array<Target>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Target(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Target(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1EventTypeBatch = (
diff --git a/clients/client-codestar/protocols/Aws_json1_1.ts b/clients/client-codestar/protocols/Aws_json1_1.ts
index a9729ecce631a..16abba91c53ae 100644
--- a/clients/client-codestar/protocols/Aws_json1_1.ts
+++ b/clients/client-codestar/protocols/Aws_json1_1.ts
@@ -2485,14 +2485,22 @@ const serializeAws_json1_1SourceCode = (
   input: Array<Code>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Code(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Code(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagProjectRequest = (
diff --git a/clients/client-cognito-identity-provider/protocols/Aws_json1_1.ts b/clients/client-cognito-identity-provider/protocols/Aws_json1_1.ts
index 1d563ec9bc7a3..7ca1ddc4e06c7 100644
--- a/clients/client-cognito-identity-provider/protocols/Aws_json1_1.ts
+++ b/clients/client-cognito-identity-provider/protocols/Aws_json1_1.ts
@@ -16319,7 +16319,11 @@ const serializeAws_json1_1AliasAttributesListType = (
   input: Array<AliasAttributeType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AnalyticsConfigurationType = (
@@ -16371,9 +16375,11 @@ const serializeAws_json1_1AttributeListType = (
   input: Array<AttributeType>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AttributeType(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AttributeType(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AttributeMappingType = (
@@ -16391,7 +16397,11 @@ const serializeAws_json1_1AttributeNameListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AttributeType = (
@@ -16423,14 +16433,22 @@ const serializeAws_json1_1BlockedIPRangeListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CallbackURLsListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ChallengeResponsesType = (
@@ -16476,7 +16494,11 @@ const serializeAws_json1_1ClientPermissionListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CompromisedCredentialsActionsType = (
@@ -16985,9 +17007,11 @@ const serializeAws_json1_1CustomAttributesListType = (
   input: Array<SchemaAttributeType>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SchemaAttributeType(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SchemaAttributeType(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CustomDomainConfigType = (
@@ -17116,7 +17140,11 @@ const serializeAws_json1_1DeliveryMediumListType = (
   input: Array<DeliveryMediumType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DescribeIdentityProviderRequest = (
@@ -17268,14 +17296,22 @@ const serializeAws_json1_1EventFiltersType = (
   input: Array<EventFilterType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ExplicitAuthFlowsListType = (
   input: Array<ExplicitAuthFlowsType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ForgetDeviceRequest = (
@@ -17476,16 +17512,22 @@ const serializeAws_json1_1HttpHeaderList = (
   input: Array<HttpHeader>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1HttpHeader(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1HttpHeader(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IdpIdentifiersListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InitiateAuthRequest = (
@@ -17744,16 +17786,22 @@ const serializeAws_json1_1LogoutURLsListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MFAOptionListType = (
   input: Array<MFAOptionType>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MFAOptionType(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MFAOptionType(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MFAOptionType = (
@@ -17857,7 +17905,11 @@ const serializeAws_json1_1OAuthFlowsType = (
   input: Array<OAuthFlowType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PasswordPolicyType = (
@@ -17919,9 +17971,11 @@ const serializeAws_json1_1RecoveryMechanismsType = (
   input: Array<RecoveryOptionType>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RecoveryOptionType(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RecoveryOptionType(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RecoveryOptionType = (
@@ -17977,9 +18031,11 @@ const serializeAws_json1_1ResourceServerScopeListType = (
   input: Array<ResourceServerScopeType>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResourceServerScopeType(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ResourceServerScopeType(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceServerScopeType = (
@@ -18120,23 +18176,33 @@ const serializeAws_json1_1SchemaAttributesListType = (
   input: Array<SchemaAttributeType>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SchemaAttributeType(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SchemaAttributeType(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ScopeListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SearchedAttributeNamesListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SetRiskConfigurationRequest = (
@@ -18321,7 +18387,11 @@ const serializeAws_json1_1SkippedIPRangeListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SmsConfigurationType = (
@@ -18426,7 +18496,11 @@ const serializeAws_json1_1SupportedIdentityProvidersListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -18862,7 +18936,11 @@ const serializeAws_json1_1UserPoolTagsListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UserPoolTagsType = (
@@ -18880,7 +18958,11 @@ const serializeAws_json1_1UsernameAttributesListType = (
   input: Array<UsernameAttributeType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1VerificationMessageTemplateType = (
@@ -18913,7 +18995,11 @@ const serializeAws_json1_1VerifiedAttributesListType = (
   input: Array<VerifiedAttributeType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1VerifySoftwareTokenRequest = (
diff --git a/clients/client-cognito-identity/protocols/Aws_json1_1.ts b/clients/client-cognito-identity/protocols/Aws_json1_1.ts
index bb39f04076ff3..517dd4b03f48b 100644
--- a/clients/client-cognito-identity/protocols/Aws_json1_1.ts
+++ b/clients/client-cognito-identity/protocols/Aws_json1_1.ts
@@ -2969,9 +2969,11 @@ const serializeAws_json1_1CognitoIdentityProviderList = (
   input: Array<CognitoIdentityProvider>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CognitoIdentityProvider(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CognitoIdentityProvider(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateIdentityPoolInput = (
@@ -3161,7 +3163,11 @@ const serializeAws_json1_1IdentityIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IdentityPool = (
@@ -3228,7 +3234,11 @@ const serializeAws_json1_1IdentityPoolTagsListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IdentityPoolTagsType = (
@@ -3302,7 +3312,11 @@ const serializeAws_json1_1LoginsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LoginsMap = (
@@ -3363,9 +3377,11 @@ const serializeAws_json1_1MappingRulesList = (
   input: Array<MappingRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MappingRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MappingRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MergeDeveloperIdentitiesInput = (
@@ -3392,7 +3408,11 @@ const serializeAws_json1_1OIDCProviderList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RoleMapping = (
@@ -3457,7 +3477,11 @@ const serializeAws_json1_1SAMLProviderList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SetIdentityPoolRolesInput = (
diff --git a/clients/client-cognito-sync/protocols/Aws_restJson1_1.ts b/clients/client-cognito-sync/protocols/Aws_restJson1_1.ts
index f4c01139bde52..efc123deedd9e 100644
--- a/clients/client-cognito-sync/protocols/Aws_restJson1_1.ts
+++ b/clients/client-cognito-sync/protocols/Aws_restJson1_1.ts
@@ -3013,7 +3013,11 @@ const serializeAws_restJson1_1ApplicationArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CognitoStreams = (
@@ -3093,9 +3097,11 @@ const serializeAws_restJson1_1RecordPatchList = (
   input: Array<RecordPatch>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1RecordPatch(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1RecordPatch(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ApplicationArnList = (
diff --git a/clients/client-comprehend/protocols/Aws_json1_1.ts b/clients/client-comprehend/protocols/Aws_json1_1.ts
index 8ba44ec08f243..3893312b59cd3 100644
--- a/clients/client-comprehend/protocols/Aws_json1_1.ts
+++ b/clients/client-comprehend/protocols/Aws_json1_1.ts
@@ -7032,9 +7032,11 @@ const serializeAws_json1_1EntityTypesList = (
   input: Array<EntityTypesListItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EntityTypesListItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EntityTypesListItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EntityTypesListItem = (
@@ -7297,7 +7299,11 @@ const serializeAws_json1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SentimentDetectionJobFilter = (
@@ -7658,14 +7664,22 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Subnets = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -7683,14 +7697,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-compute-optimizer/protocols/Aws_json1_0.ts b/clients/client-compute-optimizer/protocols/Aws_json1_0.ts
index 6c585225adf11..fc8150593c433 100644
--- a/clients/client-compute-optimizer/protocols/Aws_json1_0.ts
+++ b/clients/client-compute-optimizer/protocols/Aws_json1_0.ts
@@ -1069,14 +1069,22 @@ const serializeAws_json1_0AccountIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0AutoScalingGroupArns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0Filter = (
@@ -1100,14 +1108,22 @@ const serializeAws_json1_0FilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0Filters = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_0Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0GetAutoScalingGroupRecommendationsRequest = (
@@ -1225,7 +1241,11 @@ const serializeAws_json1_0InstanceArns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0UpdateEnrollmentStatusRequest = (
diff --git a/clients/client-config-service/protocols/Aws_json1_1.ts b/clients/client-config-service/protocols/Aws_json1_1.ts
index 4d50fd89d9dc0..dce16bdd7e0e8 100644
--- a/clients/client-config-service/protocols/Aws_json1_1.ts
+++ b/clients/client-config-service/protocols/Aws_json1_1.ts
@@ -9125,16 +9125,22 @@ const serializeAws_json1_1AccountAggregationSourceAccountList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AccountAggregationSourceList = (
   input: Array<AccountAggregationSource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AccountAggregationSource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AccountAggregationSource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AggregateResourceIdentifier = (
@@ -9164,14 +9170,22 @@ const serializeAws_json1_1AggregatedSourceStatusTypeList = (
   input: Array<AggregatedSourceStatusType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AggregatorRegionList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchGetAggregateResourceConfigRequest = (
@@ -9212,14 +9226,22 @@ const serializeAws_json1_1ComplianceResourceTypes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ComplianceTypes = (
   input: Array<ComplianceType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConfigRule = (
@@ -9298,7 +9320,11 @@ const serializeAws_json1_1ConfigRuleNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConfigSnapshotDeliveryProperties = (
@@ -9316,7 +9342,11 @@ const serializeAws_json1_1ConfigurationAggregatorNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConfigurationRecorder = (
@@ -9343,7 +9373,11 @@ const serializeAws_json1_1ConfigurationRecorderNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConformancePackComplianceFilters = (
@@ -9369,14 +9403,22 @@ const serializeAws_json1_1ConformancePackComplianceResourceIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConformancePackConfigRuleNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConformancePackEvaluationFilters = (
@@ -9427,23 +9469,35 @@ const serializeAws_json1_1ConformancePackInputParameters = (
   input: Array<ConformancePackInputParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ConformancePackInputParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ConformancePackInputParameter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConformancePackNamesList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConformancePackNamesToSummarizeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteAggregationAuthorizationRequest = (
@@ -9665,7 +9719,11 @@ const serializeAws_json1_1DeliveryChannelNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DescribeAggregateComplianceByConfigRulesRequest = (
@@ -10185,16 +10243,22 @@ const serializeAws_json1_1Evaluations = (
   input: Array<Evaluation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Evaluation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Evaluation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ExcludedAccounts = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ExecutionControls = (
@@ -10619,21 +10683,33 @@ const serializeAws_json1_1OrganizationConfigRuleNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OrganizationConfigRuleTriggerTypes = (
   input: Array<OrganizationConfigRuleTriggerType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OrganizationConformancePackNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OrganizationCustomRuleMetadata = (
@@ -11049,7 +11125,11 @@ const serializeAws_json1_1ReevaluateConfigRuleNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RemediationConfiguration = (
@@ -11106,9 +11186,11 @@ const serializeAws_json1_1RemediationConfigurations = (
   input: Array<RemediationConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RemediationConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RemediationConfiguration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RemediationExceptionResourceKey = (
@@ -11129,9 +11211,13 @@ const serializeAws_json1_1RemediationExceptionResourceKeys = (
   input: Array<RemediationExceptionResourceKey>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RemediationExceptionResourceKey(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1RemediationExceptionResourceKey(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RemediationParameterValue = (
@@ -11209,16 +11295,24 @@ const serializeAws_json1_1ResourceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceIdentifiersList = (
   input: Array<AggregateResourceIdentifier>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AggregateResourceIdentifier(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1AggregateResourceIdentifier(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceKey = (
@@ -11239,30 +11333,44 @@ const serializeAws_json1_1ResourceKeys = (
   input: Array<ResourceKey>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResourceKey(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ResourceKey(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceTypeList = (
   input: Array<ResourceType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceTypes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceTypesScope = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceValue = (
@@ -11280,7 +11388,11 @@ const serializeAws_json1_1RetentionConfigurationNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Scope = (
@@ -11366,9 +11478,11 @@ const serializeAws_json1_1SourceDetails = (
   input: Array<SourceDetail>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SourceDetail(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SourceDetail(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SsmControls = (
@@ -11434,7 +11548,11 @@ const serializeAws_json1_1StaticParameterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StaticValue = (
@@ -11491,14 +11609,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -11530,7 +11656,11 @@ const serializeAws_json1_1TagsList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceRequest = (
diff --git a/clients/client-connect/protocols/Aws_restJson1_1.ts b/clients/client-connect/protocols/Aws_restJson1_1.ts
index 841a6ee998bdd..fb9a9f2452b30 100644
--- a/clients/client-connect/protocols/Aws_restJson1_1.ts
+++ b/clients/client-connect/protocols/Aws_restJson1_1.ts
@@ -4554,7 +4554,11 @@ const serializeAws_restJson1_1Channels = (
   input: Array<Channel | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CurrentMetric = (
@@ -4575,9 +4579,11 @@ const serializeAws_restJson1_1CurrentMetrics = (
   input: Array<CurrentMetric>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CurrentMetric(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CurrentMetric(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Filters = (
@@ -4604,7 +4610,11 @@ const serializeAws_restJson1_1Groupings = (
   input: Array<Grouping | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1HistoricalMetric = (
@@ -4634,16 +4644,22 @@ const serializeAws_restJson1_1HistoricalMetrics = (
   input: Array<HistoricalMetric>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1HistoricalMetric(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1HistoricalMetric(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Queues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Threshold = (
@@ -4664,7 +4680,11 @@ const serializeAws_restJson1_1SecurityProfileIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
diff --git a/clients/client-connectparticipant/protocols/Aws_restJson1_1.ts b/clients/client-connectparticipant/protocols/Aws_restJson1_1.ts
index b0624bae540a7..c9937423c054f 100644
--- a/clients/client-connectparticipant/protocols/Aws_restJson1_1.ts
+++ b/clients/client-connectparticipant/protocols/Aws_restJson1_1.ts
@@ -750,7 +750,11 @@ const serializeAws_restJson1_1ConnectionTypeList = (
   input: Array<ConnectionType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StartPosition = (
diff --git a/clients/client-cost-and-usage-report-service/protocols/Aws_json1_1.ts b/clients/client-cost-and-usage-report-service/protocols/Aws_json1_1.ts
index e80be9b389002..08f1079c4da22 100644
--- a/clients/client-cost-and-usage-report-service/protocols/Aws_json1_1.ts
+++ b/clients/client-cost-and-usage-report-service/protocols/Aws_json1_1.ts
@@ -487,7 +487,11 @@ const serializeAws_json1_1AdditionalArtifactList = (
   input: Array<AdditionalArtifact | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteReportDefinitionRequest = (
@@ -601,7 +605,11 @@ const serializeAws_json1_1SchemaElementList = (
   input: Array<SchemaElement | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AdditionalArtifactList = (
diff --git a/clients/client-cost-explorer/protocols/Aws_json1_1.ts b/clients/client-cost-explorer/protocols/Aws_json1_1.ts
index b60155e1475ef..54e657b48f4fc 100644
--- a/clients/client-cost-explorer/protocols/Aws_json1_1.ts
+++ b/clients/client-cost-explorer/protocols/Aws_json1_1.ts
@@ -2215,9 +2215,11 @@ const serializeAws_json1_1CostCategoryRulesList = (
   input: Array<CostCategoryRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CostCategoryRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CostCategoryRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CostCategoryValues = (
@@ -2354,9 +2356,11 @@ const serializeAws_json1_1Expressions = (
   input: Array<Expression>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Expression(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Expression(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetCostAndUsageRequest = (
@@ -2809,9 +2813,11 @@ const serializeAws_json1_1GroupDefinitions = (
   input: Array<GroupDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1GroupDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1GroupDefinition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListCostCategoryDefinitionsRequest = (
@@ -2832,7 +2838,11 @@ const serializeAws_json1_1MetricNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServiceSpecification = (
@@ -2887,7 +2897,11 @@ const serializeAws_json1_1Values = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1Attributes = (
diff --git a/clients/client-data-pipeline/protocols/Aws_json1_1.ts b/clients/client-data-pipeline/protocols/Aws_json1_1.ts
index d9e639e229d50..9a58d7faa2d36 100644
--- a/clients/client-data-pipeline/protocols/Aws_json1_1.ts
+++ b/clients/client-data-pipeline/protocols/Aws_json1_1.ts
@@ -2373,9 +2373,11 @@ const serializeAws_json1_1ParameterAttributeList = (
   input: Array<ParameterAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ParameterAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ParameterAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterObject = (
@@ -2399,9 +2401,11 @@ const serializeAws_json1_1ParameterObjectList = (
   input: Array<ParameterObject>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ParameterObject(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ParameterObject(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterValue = (
@@ -2422,9 +2426,11 @@ const serializeAws_json1_1ParameterValueList = (
   input: Array<ParameterValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ParameterValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ParameterValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PipelineObject = (
@@ -2448,9 +2454,11 @@ const serializeAws_json1_1PipelineObjectList = (
   input: Array<PipelineObject>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PipelineObject(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PipelineObject(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PollForTaskInput = (
@@ -2608,9 +2616,11 @@ const serializeAws_json1_1SelectorList = (
   input: Array<Selector>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Selector(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Selector(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SetStatusInput = (
@@ -2700,28 +2710,44 @@ const serializeAws_json1_1fieldList = (
   input: Array<Field>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Field(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Field(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1idList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1stringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1tagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1ActivatePipelineOutput = (
diff --git a/clients/client-database-migration-service/protocols/Aws_json1_1.ts b/clients/client-database-migration-service/protocols/Aws_json1_1.ts
index 7dbf616545c00..5b4d32ed5a40b 100644
--- a/clients/client-database-migration-service/protocols/Aws_json1_1.ts
+++ b/clients/client-database-migration-service/protocols/Aws_json1_1.ts
@@ -5899,7 +5899,11 @@ const serializeAws_json1_1EventCategoriesList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filter = (
@@ -5923,14 +5927,22 @@ const serializeAws_json1_1FilterList = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ImportCertificateMessage = (
@@ -5959,7 +5971,11 @@ const serializeAws_json1_1KeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1KinesisSettings = (
@@ -6477,7 +6493,11 @@ const serializeAws_json1_1SourceIdsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartReplicationTaskAssessmentMessage = (
@@ -6531,16 +6551,22 @@ const serializeAws_json1_1SubnetIdentifierList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TableListToReload = (
   input: Array<TableToReload>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TableToReload(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TableToReload(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TableToReload = (
@@ -6572,7 +6598,11 @@ const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TestConnectionMessage = (
@@ -6593,7 +6623,11 @@ const serializeAws_json1_1VpcSecurityGroupIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AccessDeniedFault = (
diff --git a/clients/client-dataexchange/protocols/Aws_restJson1_1.ts b/clients/client-dataexchange/protocols/Aws_restJson1_1.ts
index 62d6d61801833..d9e5f33840bb2 100644
--- a/clients/client-dataexchange/protocols/Aws_restJson1_1.ts
+++ b/clients/client-dataexchange/protocols/Aws_restJson1_1.ts
@@ -3531,18 +3531,24 @@ const serializeAws_restJson1_1ListOfAssetDestinationEntry = (
   input: Array<AssetDestinationEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AssetDestinationEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1AssetDestinationEntry(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfAssetSourceEntry = (
   input: Array<AssetSourceEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AssetSourceEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AssetSourceEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1MapOf__string = (
diff --git a/clients/client-datasync/protocols/Aws_json1_1.ts b/clients/client-datasync/protocols/Aws_json1_1.ts
index 09df04548405c..d41cb75ff02ca 100644
--- a/clients/client-datasync/protocols/Aws_json1_1.ts
+++ b/clients/client-datasync/protocols/Aws_json1_1.ts
@@ -2482,7 +2482,11 @@ const serializeAws_json1_1AgentArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CancelTaskExecutionRequest = (
@@ -2817,16 +2821,22 @@ const serializeAws_json1_1Ec2SecurityGroupArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FilterList = (
   input: Array<FilterRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1FilterRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1FilterRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FilterRule = (
@@ -2989,14 +2999,22 @@ const serializeAws_json1_1PLSecurityGroupArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PLSubnetArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1S3Config = (
@@ -3048,16 +3066,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<TagListEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TagListEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TagListEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagListEntry = (
diff --git a/clients/client-dax/protocols/Aws_json1_1.ts b/clients/client-dax/protocols/Aws_json1_1.ts
index 693b3fd668152..8caee44b22882 100644
--- a/clients/client-dax/protocols/Aws_json1_1.ts
+++ b/clients/client-dax/protocols/Aws_json1_1.ts
@@ -3163,14 +3163,22 @@ const serializeAws_json1_1AvailabilityZoneList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ClusterNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateClusterRequest = (
@@ -3473,7 +3481,11 @@ const serializeAws_json1_1KeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListTagsRequest = (
@@ -3494,14 +3506,22 @@ const serializeAws_json1_1NodeIdentifierList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterGroupNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterNameValue = (
@@ -3522,9 +3542,11 @@ const serializeAws_json1_1ParameterNameValueList = (
   input: Array<ParameterNameValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ParameterNameValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ParameterNameValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RebootNodeRequest = (
@@ -3556,21 +3578,33 @@ const serializeAws_json1_1SecurityGroupIdentifierList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SubnetGroupNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SubnetIdentifierList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -3588,7 +3622,11 @@ const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-detective/protocols/Aws_restJson1_1.ts b/clients/client-detective/protocols/Aws_restJson1_1.ts
index 0de81f137b967..f3d418e9898bf 100644
--- a/clients/client-detective/protocols/Aws_restJson1_1.ts
+++ b/clients/client-detective/protocols/Aws_restJson1_1.ts
@@ -1355,16 +1355,22 @@ const serializeAws_restJson1_1AccountIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AccountList = (
   input: Array<Account>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Account(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Account(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1AccountIdList = (
diff --git a/clients/client-device-farm/protocols/Aws_json1_1.ts b/clients/client-device-farm/protocols/Aws_json1_1.ts
index 0adee427e2c5c..b6f269ee95cc2 100644
--- a/clients/client-device-farm/protocols/Aws_json1_1.ts
+++ b/clients/client-device-farm/protocols/Aws_json1_1.ts
@@ -8693,14 +8693,22 @@ const serializeAws_json1_1AmazonResourceNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AndroidPaths = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateDevicePoolRequest = (
@@ -9098,23 +9106,33 @@ const serializeAws_json1_1DeviceFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeviceFilters = (
   input: Array<DeviceFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DeviceFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DeviceFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeviceHostPaths = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeviceSelectionConfiguration = (
@@ -9394,14 +9412,22 @@ const serializeAws_json1_1InstanceLabels = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IosPaths = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListArtifactsRequest = (
@@ -9799,7 +9825,11 @@ const serializeAws_json1_1PackageIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PurchaseOfferingRequest = (
@@ -9874,7 +9904,11 @@ const serializeAws_json1_1Rules = (
   input: Array<Rule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Rule(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Rule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ScheduleRunConfiguration = (
@@ -10050,14 +10084,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-direct-connect/protocols/Aws_json1_1.ts b/clients/client-direct-connect/protocols/Aws_json1_1.ts
index baebb8c9ef9c6..1455500e1fd07 100644
--- a/clients/client-direct-connect/protocols/Aws_json1_1.ts
+++ b/clients/client-direct-connect/protocols/Aws_json1_1.ts
@@ -6282,7 +6282,11 @@ const serializeAws_json1_1ResourceArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RouteFilterPrefix = (
@@ -6300,9 +6304,11 @@ const serializeAws_json1_1RouteFilterPrefixList = (
   input: Array<RouteFilterPrefix>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RouteFilterPrefix(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RouteFilterPrefix(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -6320,14 +6326,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-directory-service/protocols/Aws_json1_1.ts b/clients/client-directory-service/protocols/Aws_json1_1.ts
index 905a836bc7f41..0f1fd1441fe87 100644
--- a/clients/client-directory-service/protocols/Aws_json1_1.ts
+++ b/clients/client-directory-service/protocols/Aws_json1_1.ts
@@ -7737,9 +7737,11 @@ const serializeAws_json1_1Attributes = (
   input: Array<Attribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Attribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Attribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CancelSchemaExtensionRequest = (
@@ -7760,7 +7762,11 @@ const serializeAws_json1_1CidrIps = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConnectDirectoryRequest = (
@@ -8282,7 +8288,11 @@ const serializeAws_json1_1DirectoryIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DirectoryVpcSettings = (
@@ -8348,14 +8358,22 @@ const serializeAws_json1_1DnsIpAddrs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DomainControllerIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EnableLDAPSRequest = (
@@ -8443,9 +8461,11 @@ const serializeAws_json1_1IpRoutes = (
   input: Array<IpRoute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IpRoute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1IpRoute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListCertificatesRequest = (
@@ -8611,7 +8631,11 @@ const serializeAws_json1_1RemoteDomainNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RemoveIpRoutesRequest = (
@@ -8674,7 +8698,11 @@ const serializeAws_json1_1Servers = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ShareDirectoryRequest = (
@@ -8718,7 +8746,11 @@ const serializeAws_json1_1SnapshotIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartSchemaExtensionRequest = (
@@ -8746,7 +8778,11 @@ const serializeAws_json1_1SubnetIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -8764,28 +8800,44 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TopicNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TrustIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UnshareDirectoryRequest = (
diff --git a/clients/client-dlm/protocols/Aws_restJson1_1.ts b/clients/client-dlm/protocols/Aws_restJson1_1.ts
index fdde9d5ebd89d..c675cd9784278 100644
--- a/clients/client-dlm/protocols/Aws_restJson1_1.ts
+++ b/clients/client-dlm/protocols/Aws_restJson1_1.ts
@@ -1098,7 +1098,11 @@ const serializeAws_restJson1_1AvailabilityZoneList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CreateRule = (
@@ -1167,9 +1171,11 @@ const serializeAws_restJson1_1CrossRegionCopyRules = (
   input: Array<CrossRegionCopyRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CrossRegionCopyRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CrossRegionCopyRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FastRestoreRule = (
@@ -1249,7 +1255,11 @@ const serializeAws_restJson1_1ResourceTypeValuesList = (
   input: Array<ResourceTypeValues | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1RetainRule = (
@@ -1325,9 +1335,11 @@ const serializeAws_restJson1_1ScheduleList = (
   input: Array<Schedule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Schedule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Schedule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tag = (
@@ -1359,34 +1371,44 @@ const serializeAws_restJson1_1TagsToAddList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TargetTagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TimesList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1VariableTagsList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1AvailabilityZoneList = (
diff --git a/clients/client-docdb/protocols/Aws_query.ts b/clients/client-docdb/protocols/Aws_query.ts
index cd25893352419..73fbe81415add 100644
--- a/clients/client-docdb/protocols/Aws_query.ts
+++ b/clients/client-docdb/protocols/Aws_query.ts
@@ -5747,10 +5747,10 @@ const serializeAws_queryAttributeValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AttributeValue.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5760,10 +5760,10 @@ const serializeAws_queryAvailabilityZones = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AvailabilityZone.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6504,10 +6504,10 @@ const serializeAws_queryEventCategoriesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`EventCategory.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6552,13 +6552,13 @@ const serializeAws_queryFilterList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryFilter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Filter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6568,10 +6568,10 @@ const serializeAws_queryFilterValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Value.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6581,10 +6581,10 @@ const serializeAws_queryKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6612,10 +6612,10 @@ const serializeAws_queryLogTypeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6835,13 +6835,13 @@ const serializeAws_queryParametersList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryParameter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Parameter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7057,10 +7057,10 @@ const serializeAws_querySubnetIdentifierList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SubnetIdentifier.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7081,13 +7081,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Tag.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7097,10 +7097,10 @@ const serializeAws_queryVpcSecurityGroupIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VpcSecurityGroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-dynamodb/protocols/Aws_json1_0.ts b/clients/client-dynamodb/protocols/Aws_json1_0.ts
index d92986ec0dced..80db8a85fea1a 100644
--- a/clients/client-dynamodb/protocols/Aws_json1_0.ts
+++ b/clients/client-dynamodb/protocols/Aws_json1_0.ts
@@ -5302,16 +5302,22 @@ const serializeAws_json1_0AttributeDefinitions = (
   input: Array<AttributeDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0AttributeDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0AttributeDefinition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0AttributeNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0AttributeUpdates = (
@@ -5379,9 +5385,11 @@ const serializeAws_json1_0AttributeValueList = (
   input: Array<AttributeValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0AttributeValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0AttributeValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0AttributeValueUpdate = (
@@ -5532,7 +5540,11 @@ const serializeAws_json1_0BinarySetAttributeValue = (
   input: Array<Uint8Array>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => context.base64Encoder(entry));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(context.base64Encoder(entry));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0Condition = (
@@ -6199,18 +6211,24 @@ const serializeAws_json1_0GlobalSecondaryIndexAutoScalingUpdateList = (
   input: Array<GlobalSecondaryIndexAutoScalingUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0GlobalSecondaryIndexAutoScalingUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_0GlobalSecondaryIndexAutoScalingUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_0GlobalSecondaryIndexList = (
   input: Array<GlobalSecondaryIndex>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0GlobalSecondaryIndex(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0GlobalSecondaryIndex(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0GlobalSecondaryIndexUpdate = (
@@ -6243,9 +6261,13 @@ const serializeAws_json1_0GlobalSecondaryIndexUpdateList = (
   input: Array<GlobalSecondaryIndexUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0GlobalSecondaryIndexUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_0GlobalSecondaryIndexUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_0GlobalTableGlobalSecondaryIndexSettingsUpdate = (
@@ -6275,12 +6297,16 @@ const serializeAws_json1_0GlobalTableGlobalSecondaryIndexSettingsUpdateList = (
   input: Array<GlobalTableGlobalSecondaryIndexSettingsUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0GlobalTableGlobalSecondaryIndexSettingsUpdate(
-      entry,
-      context
-    )
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_0GlobalTableGlobalSecondaryIndexSettingsUpdate(
+        entry,
+        context
+      )
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_0Key = (
@@ -6309,16 +6335,22 @@ const serializeAws_json1_0KeyList = (
   input: Array<{ [key: string]: AttributeValue }>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_0Key(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0Key(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0KeySchema = (
   input: Array<KeySchemaElement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0KeySchemaElement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0KeySchemaElement(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0KeySchemaElement = (
@@ -6370,9 +6402,11 @@ const serializeAws_json1_0ListAttributeValue = (
   input: Array<AttributeValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0AttributeValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0AttributeValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ListBackupsInput = (
@@ -6495,9 +6529,11 @@ const serializeAws_json1_0LocalSecondaryIndexList = (
   input: Array<LocalSecondaryIndex>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0LocalSecondaryIndex(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0LocalSecondaryIndex(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0MapAttributeValue = (
@@ -6515,14 +6551,22 @@ const serializeAws_json1_0NonKeyAttributeNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0NumberSetAttributeValue = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0PointInTimeRecoverySpecification = (
@@ -6820,9 +6864,11 @@ const serializeAws_json1_0ReplicaAutoScalingUpdateList = (
   input: Array<ReplicaAutoScalingUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ReplicaAutoScalingUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0ReplicaAutoScalingUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ReplicaGlobalSecondaryIndex = (
@@ -6867,21 +6913,29 @@ const serializeAws_json1_0ReplicaGlobalSecondaryIndexAutoScalingUpdateList = (
   input: Array<ReplicaGlobalSecondaryIndexAutoScalingUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ReplicaGlobalSecondaryIndexAutoScalingUpdate(
-      entry,
-      context
-    )
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_0ReplicaGlobalSecondaryIndexAutoScalingUpdate(
+        entry,
+        context
+      )
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ReplicaGlobalSecondaryIndexList = (
   input: Array<ReplicaGlobalSecondaryIndex>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ReplicaGlobalSecondaryIndex(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_0ReplicaGlobalSecondaryIndex(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ReplicaGlobalSecondaryIndexSettingsUpdate = (
@@ -6911,21 +6965,27 @@ const serializeAws_json1_0ReplicaGlobalSecondaryIndexSettingsUpdateList = (
   input: Array<ReplicaGlobalSecondaryIndexSettingsUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ReplicaGlobalSecondaryIndexSettingsUpdate(
-      entry,
-      context
-    )
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_0ReplicaGlobalSecondaryIndexSettingsUpdate(
+        entry,
+        context
+      )
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ReplicaList = (
   input: Array<Replica>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0Replica(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0Replica(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ReplicaSettingsUpdate = (
@@ -6965,9 +7025,11 @@ const serializeAws_json1_0ReplicaSettingsUpdateList = (
   input: Array<ReplicaSettingsUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ReplicaSettingsUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0ReplicaSettingsUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ReplicaUpdate = (
@@ -6994,9 +7056,11 @@ const serializeAws_json1_0ReplicaUpdateList = (
   input: Array<ReplicaUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ReplicaUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0ReplicaUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ReplicationGroupUpdate = (
@@ -7035,9 +7099,11 @@ const serializeAws_json1_0ReplicationGroupUpdateList = (
   input: Array<ReplicationGroupUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ReplicationGroupUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0ReplicationGroupUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0RestoreTableFromBackupInput = (
@@ -7240,7 +7306,11 @@ const serializeAws_json1_0StringSetAttributeValue = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0Tag = (input: Tag, context: __SerdeContext): any => {
@@ -7258,14 +7328,22 @@ const serializeAws_json1_0TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_0Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0TagResourceInput = (
@@ -7311,9 +7389,11 @@ const serializeAws_json1_0TransactGetItemList = (
   input: Array<TransactGetItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0TransactGetItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0TransactGetItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0TransactGetItemsInput = (
@@ -7360,9 +7440,11 @@ const serializeAws_json1_0TransactWriteItemList = (
   input: Array<TransactWriteItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0TransactWriteItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0TransactWriteItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0TransactWriteItemsInput = (
@@ -7793,9 +7875,11 @@ const serializeAws_json1_0WriteRequests = (
   input: Array<WriteRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0WriteRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0WriteRequest(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_0DescribeEndpointsResponse = (
diff --git a/clients/client-ec2/protocols/Aws_ec2.ts b/clients/client-ec2/protocols/Aws_ec2.ts
index 61737b2df78b5..d31b191469830 100644
--- a/clients/client-ec2/protocols/Aws_ec2.ts
+++ b/clients/client-ec2/protocols/Aws_ec2.ts
@@ -31962,10 +31962,10 @@ const serializeAws_ec2AccountAttributeNameStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AttributeName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32054,10 +32054,10 @@ const serializeAws_ec2AllocationIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AllocationId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32342,10 +32342,10 @@ const serializeAws_ec2AssociationIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AssociationId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32597,10 +32597,10 @@ const serializeAws_ec2AvailabilityZoneStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AvailabilityZone.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32610,10 +32610,10 @@ const serializeAws_ec2BillingProductList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32658,13 +32658,13 @@ const serializeAws_ec2BlockDeviceMappingList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2BlockDeviceMapping(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32674,13 +32674,13 @@ const serializeAws_ec2BlockDeviceMappingRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2BlockDeviceMapping(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`BlockDeviceMapping.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32690,10 +32690,10 @@ const serializeAws_ec2BundleIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`BundleId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32855,10 +32855,10 @@ const serializeAws_ec2CapacityReservationIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -32949,13 +32949,13 @@ const serializeAws_ec2ClassicLoadBalancers = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ClassicLoadBalancer(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -33034,7 +33034,7 @@ const serializeAws_ec2ClientVpnAuthenticationRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ClientVpnAuthenticationRequest(
       entry,
       context
@@ -33043,7 +33043,7 @@ const serializeAws_ec2ClientVpnAuthenticationRequestList = (
       entries[`Member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -33053,10 +33053,10 @@ const serializeAws_ec2ClientVpnSecurityGroupIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -33066,10 +33066,10 @@ const serializeAws_ec2CoipPoolIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -33113,10 +33113,10 @@ const serializeAws_ec2ConversionIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -34684,7 +34684,7 @@ const serializeAws_ec2CreateVolumePermissionList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2CreateVolumePermission(
       entry,
       context
@@ -34693,7 +34693,7 @@ const serializeAws_ec2CreateVolumePermissionList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -35031,10 +35031,10 @@ const serializeAws_ec2CustomerGatewayIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`CustomerGatewayId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -35373,10 +35373,10 @@ const serializeAws_ec2DeleteQueuedReservedInstancesIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -39512,10 +39512,10 @@ const serializeAws_ec2DhcpOptionsIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`DhcpOptionsId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -39802,13 +39802,13 @@ const serializeAws_ec2DiskImageList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2DiskImage(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -39882,10 +39882,10 @@ const serializeAws_ec2EgressOnlyInternetGatewayIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -39895,10 +39895,10 @@ const serializeAws_ec2ElasticGpuIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -39919,7 +39919,7 @@ const serializeAws_ec2ElasticGpuSpecificationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ElasticGpuSpecification(
       entry,
       context
@@ -39928,7 +39928,7 @@ const serializeAws_ec2ElasticGpuSpecificationList = (
       entries[`ElasticGpuSpecification.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -39938,7 +39938,7 @@ const serializeAws_ec2ElasticGpuSpecifications = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ElasticGpuSpecification(
       entry,
       context
@@ -39947,7 +39947,7 @@ const serializeAws_ec2ElasticGpuSpecifications = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -39971,7 +39971,7 @@ const serializeAws_ec2ElasticInferenceAccelerators = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ElasticInferenceAccelerator(
       entry,
       context
@@ -39980,7 +39980,7 @@ const serializeAws_ec2ElasticInferenceAccelerators = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40102,10 +40102,10 @@ const serializeAws_ec2ExecutableByStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ExecutableBy.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40182,10 +40182,10 @@ const serializeAws_ec2ExportImageTaskIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ExportImageTaskId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40195,10 +40195,10 @@ const serializeAws_ec2ExportTaskIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ExportTaskId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40287,13 +40287,13 @@ const serializeAws_ec2FilterList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Filter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Filter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40303,10 +40303,10 @@ const serializeAws_ec2FleetIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40316,7 +40316,7 @@ const serializeAws_ec2FleetLaunchTemplateConfigListRequest = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2FleetLaunchTemplateConfigRequest(
       entry,
       context
@@ -40325,7 +40325,7 @@ const serializeAws_ec2FleetLaunchTemplateConfigListRequest = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40363,7 +40363,7 @@ const serializeAws_ec2FleetLaunchTemplateOverridesListRequest = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2FleetLaunchTemplateOverridesRequest(
       entry,
       context
@@ -40372,7 +40372,7 @@ const serializeAws_ec2FleetLaunchTemplateOverridesListRequest = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40449,10 +40449,10 @@ const serializeAws_ec2FpgaImageIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40788,10 +40788,10 @@ const serializeAws_ec2GroupIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`GroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40815,13 +40815,13 @@ const serializeAws_ec2GroupIdentifierList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2GroupIdentifier(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40831,10 +40831,10 @@ const serializeAws_ec2GroupIds = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40844,10 +40844,10 @@ const serializeAws_ec2GroupNameStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`GroupName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40868,10 +40868,10 @@ const serializeAws_ec2HostReservationIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40881,7 +40881,7 @@ const serializeAws_ec2IKEVersionsRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2IKEVersionsRequestListValue(
       entry,
       context
@@ -40890,7 +40890,7 @@ const serializeAws_ec2IKEVersionsRequestList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40969,13 +40969,13 @@ const serializeAws_ec2ImageDiskContainerList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ImageDiskContainer(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -40985,10 +40985,10 @@ const serializeAws_ec2ImageIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ImageId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41026,7 +41026,7 @@ const serializeAws_ec2ImportImageLicenseSpecificationListRequest = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ImportImageLicenseConfigurationRequest(
       entry,
       context
@@ -41035,7 +41035,7 @@ const serializeAws_ec2ImportImageLicenseSpecificationListRequest = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41275,10 +41275,10 @@ const serializeAws_ec2ImportTaskIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ImportTaskId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41346,7 +41346,7 @@ const serializeAws_ec2InstanceBlockDeviceMappingSpecificationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2InstanceBlockDeviceMappingSpecification(
       entry,
       context
@@ -41355,7 +41355,7 @@ const serializeAws_ec2InstanceBlockDeviceMappingSpecificationList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41365,7 +41365,7 @@ const serializeAws_ec2InstanceCreditSpecificationListRequest = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2InstanceCreditSpecificationRequest(
       entry,
       context
@@ -41374,7 +41374,7 @@ const serializeAws_ec2InstanceCreditSpecificationListRequest = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41398,10 +41398,10 @@ const serializeAws_ec2InstanceIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`InstanceId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41422,13 +41422,13 @@ const serializeAws_ec2InstanceIpv6AddressList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2InstanceIpv6Address(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41438,7 +41438,7 @@ const serializeAws_ec2InstanceIpv6AddressListRequest = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2InstanceIpv6AddressRequest(
       entry,
       context
@@ -41447,7 +41447,7 @@ const serializeAws_ec2InstanceIpv6AddressListRequest = (
       entries[`InstanceIpv6Address.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41575,7 +41575,7 @@ const serializeAws_ec2InstanceNetworkInterfaceSpecificationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2InstanceNetworkInterfaceSpecification(
       entry,
       context
@@ -41584,7 +41584,7 @@ const serializeAws_ec2InstanceNetworkInterfaceSpecificationList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41608,10 +41608,10 @@ const serializeAws_ec2InstanceTypeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41675,13 +41675,13 @@ const serializeAws_ec2IpPermissionList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2IpPermission(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41705,13 +41705,13 @@ const serializeAws_ec2IpRangeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2IpRange(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41721,10 +41721,10 @@ const serializeAws_ec2Ipv6AddressList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41748,13 +41748,13 @@ const serializeAws_ec2Ipv6RangeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Ipv6Range(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41764,10 +41764,10 @@ const serializeAws_ec2KeyNameStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`KeyName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41777,10 +41777,10 @@ const serializeAws_ec2KeyPairIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`KeyPairId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41804,13 +41804,13 @@ const serializeAws_ec2LaunchPermissionList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LaunchPermission(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41848,7 +41848,7 @@ const serializeAws_ec2LaunchSpecsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2SpotFleetLaunchSpecification(
       entry,
       context
@@ -41857,7 +41857,7 @@ const serializeAws_ec2LaunchSpecsList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41894,7 +41894,7 @@ const serializeAws_ec2LaunchTemplateBlockDeviceMappingRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LaunchTemplateBlockDeviceMappingRequest(
       entry,
       context
@@ -41903,7 +41903,7 @@ const serializeAws_ec2LaunchTemplateBlockDeviceMappingRequestList = (
       entries[`BlockDeviceMapping.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -41963,13 +41963,13 @@ const serializeAws_ec2LaunchTemplateConfigList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LaunchTemplateConfig(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42036,7 +42036,7 @@ const serializeAws_ec2LaunchTemplateElasticInferenceAcceleratorList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LaunchTemplateElasticInferenceAccelerator(
       entry,
       context
@@ -42045,7 +42045,7 @@ const serializeAws_ec2LaunchTemplateElasticInferenceAcceleratorList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42187,7 +42187,7 @@ const serializeAws_ec2LaunchTemplateInstanceNetworkInterfaceSpecificationRequest
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LaunchTemplateInstanceNetworkInterfaceSpecificationRequest(
       entry,
       context
@@ -42197,7 +42197,7 @@ const serializeAws_ec2LaunchTemplateInstanceNetworkInterfaceSpecificationRequest
         memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42218,7 +42218,7 @@ const serializeAws_ec2LaunchTemplateLicenseSpecificationListRequest = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LaunchTemplateLicenseConfigurationRequest(
       entry,
       context
@@ -42227,7 +42227,7 @@ const serializeAws_ec2LaunchTemplateLicenseSpecificationListRequest = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42237,10 +42237,10 @@ const serializeAws_ec2LaunchTemplateNameStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42276,7 +42276,7 @@ const serializeAws_ec2LaunchTemplateOverridesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LaunchTemplateOverrides(
       entry,
       context
@@ -42285,7 +42285,7 @@ const serializeAws_ec2LaunchTemplateOverridesList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42386,7 +42386,7 @@ const serializeAws_ec2LaunchTemplateTagSpecificationRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LaunchTemplateTagSpecificationRequest(
       entry,
       context
@@ -42396,7 +42396,7 @@ const serializeAws_ec2LaunchTemplateTagSpecificationRequestList = (
         memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42428,7 +42428,7 @@ const serializeAws_ec2LicenseSpecificationListRequest = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LicenseConfigurationRequest(
       entry,
       context
@@ -42437,7 +42437,7 @@ const serializeAws_ec2LicenseSpecificationListRequest = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42475,13 +42475,13 @@ const serializeAws_ec2LoadPermissionListRequest = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2LoadPermissionRequest(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42533,10 +42533,10 @@ const serializeAws_ec2LocalGatewayIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42546,10 +42546,10 @@ const serializeAws_ec2LocalGatewayRouteTableIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42559,10 +42559,10 @@ const serializeAws_ec2LocalGatewayRouteTableVirtualInterfaceGroupAssociationIdSe
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42572,10 +42572,10 @@ const serializeAws_ec2LocalGatewayRouteTableVpcAssociationIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42585,10 +42585,10 @@ const serializeAws_ec2LocalGatewayVirtualInterfaceGroupIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -42598,10 +42598,10 @@ const serializeAws_ec2LocalGatewayVirtualInterfaceIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44159,10 +44159,10 @@ const serializeAws_ec2NetworkInterfaceIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44172,10 +44172,10 @@ const serializeAws_ec2NetworkInterfacePermissionIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44206,13 +44206,13 @@ const serializeAws_ec2NewDhcpConfigurationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2NewDhcpConfiguration(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44222,10 +44222,10 @@ const serializeAws_ec2OccurrenceDayRequestSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`OccurenceDay.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44268,10 +44268,10 @@ const serializeAws_ec2OwnerStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Owner.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44301,7 +44301,7 @@ const serializeAws_ec2Phase1DHGroupNumbersRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Phase1DHGroupNumbersRequestListValue(
       entry,
       context
@@ -44310,7 +44310,7 @@ const serializeAws_ec2Phase1DHGroupNumbersRequestList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44331,7 +44331,7 @@ const serializeAws_ec2Phase1EncryptionAlgorithmsRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Phase1EncryptionAlgorithmsRequestListValue(
       entry,
       context
@@ -44340,7 +44340,7 @@ const serializeAws_ec2Phase1EncryptionAlgorithmsRequestList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44361,7 +44361,7 @@ const serializeAws_ec2Phase1IntegrityAlgorithmsRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Phase1IntegrityAlgorithmsRequestListValue(
       entry,
       context
@@ -44370,7 +44370,7 @@ const serializeAws_ec2Phase1IntegrityAlgorithmsRequestList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44391,7 +44391,7 @@ const serializeAws_ec2Phase2DHGroupNumbersRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Phase2DHGroupNumbersRequestListValue(
       entry,
       context
@@ -44400,7 +44400,7 @@ const serializeAws_ec2Phase2DHGroupNumbersRequestList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44421,7 +44421,7 @@ const serializeAws_ec2Phase2EncryptionAlgorithmsRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Phase2EncryptionAlgorithmsRequestListValue(
       entry,
       context
@@ -44430,7 +44430,7 @@ const serializeAws_ec2Phase2EncryptionAlgorithmsRequestList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44451,7 +44451,7 @@ const serializeAws_ec2Phase2IntegrityAlgorithmsRequestList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Phase2IntegrityAlgorithmsRequestListValue(
       entry,
       context
@@ -44460,7 +44460,7 @@ const serializeAws_ec2Phase2IntegrityAlgorithmsRequestList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44513,10 +44513,10 @@ const serializeAws_ec2PlacementGroupIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`GroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44526,10 +44526,10 @@ const serializeAws_ec2PlacementGroupStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44567,13 +44567,13 @@ const serializeAws_ec2PrefixListIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2PrefixListId(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44600,7 +44600,7 @@ const serializeAws_ec2PriceScheduleSpecificationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2PriceScheduleSpecification(
       entry,
       context
@@ -44609,7 +44609,7 @@ const serializeAws_ec2PriceScheduleSpecificationList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44619,7 +44619,7 @@ const serializeAws_ec2PrivateIpAddressConfigSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ScheduledInstancesPrivateIpAddressConfig(
       entry,
       context
@@ -44629,7 +44629,7 @@ const serializeAws_ec2PrivateIpAddressConfigSet = (
         memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44653,7 +44653,7 @@ const serializeAws_ec2PrivateIpAddressSpecificationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2PrivateIpAddressSpecification(
       entry,
       context
@@ -44662,7 +44662,7 @@ const serializeAws_ec2PrivateIpAddressSpecificationList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44672,10 +44672,10 @@ const serializeAws_ec2PrivateIpAddressStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`PrivateIpAddress.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44685,10 +44685,10 @@ const serializeAws_ec2ProductCodeStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ProductCode.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44698,10 +44698,10 @@ const serializeAws_ec2ProductDescriptionList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44741,10 +44741,10 @@ const serializeAws_ec2PublicIpStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`PublicIp.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44798,13 +44798,13 @@ const serializeAws_ec2PurchaseRequestSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2PurchaseRequest(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`PurchaseRequest.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44871,10 +44871,10 @@ const serializeAws_ec2ReasonCodesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -44905,10 +44905,10 @@ const serializeAws_ec2RegionNameStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`RegionName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45356,10 +45356,10 @@ const serializeAws_ec2RequestHostIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45369,10 +45369,10 @@ const serializeAws_ec2RequestHostIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45382,10 +45382,10 @@ const serializeAws_ec2RequestInstanceTypeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45783,10 +45783,10 @@ const serializeAws_ec2ReservedInstanceIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ReservedInstanceId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45833,7 +45833,7 @@ const serializeAws_ec2ReservedInstancesConfigurationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ReservedInstancesConfiguration(
       entry,
       context
@@ -45842,7 +45842,7 @@ const serializeAws_ec2ReservedInstancesConfigurationList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45852,10 +45852,10 @@ const serializeAws_ec2ReservedInstancesIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ReservedInstancesId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45865,10 +45865,10 @@ const serializeAws_ec2ReservedInstancesModificationIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ReservedInstancesModificationId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45878,10 +45878,10 @@ const serializeAws_ec2ReservedInstancesOfferingIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -45987,10 +45987,10 @@ const serializeAws_ec2ResourceIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46000,10 +46000,10 @@ const serializeAws_ec2ResourceList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46013,10 +46013,10 @@ const serializeAws_ec2RestorableByStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46468,10 +46468,10 @@ const serializeAws_ec2ScheduledInstanceIdRequestSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ScheduledInstanceId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46538,7 +46538,7 @@ const serializeAws_ec2ScheduledInstancesBlockDeviceMappingSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ScheduledInstancesBlockDeviceMapping(
       entry,
       context
@@ -46547,7 +46547,7 @@ const serializeAws_ec2ScheduledInstancesBlockDeviceMappingSet = (
       entries[`BlockDeviceMapping.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46608,7 +46608,7 @@ const serializeAws_ec2ScheduledInstancesIpv6AddressList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ScheduledInstancesIpv6Address(
       entry,
       context
@@ -46617,7 +46617,7 @@ const serializeAws_ec2ScheduledInstancesIpv6AddressList = (
       entries[`Ipv6Address.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46798,7 +46798,7 @@ const serializeAws_ec2ScheduledInstancesNetworkInterfaceSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2ScheduledInstancesNetworkInterface(
       entry,
       context
@@ -46807,7 +46807,7 @@ const serializeAws_ec2ScheduledInstancesNetworkInterfaceSet = (
       entries[`NetworkInterface.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46845,10 +46845,10 @@ const serializeAws_ec2ScheduledInstancesSecurityGroupIdSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SecurityGroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46937,10 +46937,10 @@ const serializeAws_ec2SecurityGroupIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SecurityGroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -46950,10 +46950,10 @@ const serializeAws_ec2SecurityGroupStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SecurityGroup.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47029,10 +47029,10 @@ const serializeAws_ec2SnapshotIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SnapshotId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47282,7 +47282,7 @@ const serializeAws_ec2SpotFleetTagSpecificationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2SpotFleetTagSpecification(
       entry,
       context
@@ -47291,7 +47291,7 @@ const serializeAws_ec2SpotFleetTagSpecificationList = (
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47301,10 +47301,10 @@ const serializeAws_ec2SpotInstanceRequestIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SpotInstanceRequestId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47479,10 +47479,10 @@ const serializeAws_ec2SubnetIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SubnetId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47503,13 +47503,13 @@ const serializeAws_ec2TagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2Tag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47537,13 +47537,13 @@ const serializeAws_ec2TagSpecificationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2TagSpecification(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47587,7 +47587,7 @@ const serializeAws_ec2TargetConfigurationRequestSet = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2TargetConfigurationRequest(
       entry,
       context
@@ -47597,7 +47597,7 @@ const serializeAws_ec2TargetConfigurationRequestSet = (
         memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47618,13 +47618,13 @@ const serializeAws_ec2TargetGroups = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2TargetGroup(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47693,10 +47693,10 @@ const serializeAws_ec2TrafficMirrorFilterRuleFieldList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47706,10 +47706,10 @@ const serializeAws_ec2TrafficMirrorNetworkServiceList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47733,10 +47733,10 @@ const serializeAws_ec2TrafficMirrorSessionFieldList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47746,10 +47746,10 @@ const serializeAws_ec2TransitGatewayAttachmentIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47759,10 +47759,10 @@ const serializeAws_ec2TransitGatewayIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47772,10 +47772,10 @@ const serializeAws_ec2TransitGatewayMulticastDomainIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47816,10 +47816,10 @@ const serializeAws_ec2TransitGatewayRouteTableIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -47971,10 +47971,10 @@ const serializeAws_ec2UserGroupStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`UserGroup.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48013,13 +48013,13 @@ const serializeAws_ec2UserIdGroupPairList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2UserIdGroupPair(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Item.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48029,10 +48029,10 @@ const serializeAws_ec2UserIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`UserId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48042,10 +48042,10 @@ const serializeAws_ec2ValueStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48055,10 +48055,10 @@ const serializeAws_ec2VersionStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48079,10 +48079,10 @@ const serializeAws_ec2VolumeIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VolumeId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48092,10 +48092,10 @@ const serializeAws_ec2VpcClassicLinkIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VpcId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48105,10 +48105,10 @@ const serializeAws_ec2VpcIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VpcId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48118,10 +48118,10 @@ const serializeAws_ec2VpnConnectionIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VpnConnectionId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48155,10 +48155,10 @@ const serializeAws_ec2VpnGatewayIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VpnGatewayId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48278,7 +48278,7 @@ const serializeAws_ec2VpnTunnelOptionsSpecificationsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_ec2VpnTunnelOptionsSpecification(
       entry,
       context
@@ -48287,7 +48287,7 @@ const serializeAws_ec2VpnTunnelOptionsSpecificationsList = (
       entries[`Member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48311,10 +48311,10 @@ const serializeAws_ec2ZoneIdStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ZoneId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -48324,10 +48324,10 @@ const serializeAws_ec2ZoneNameStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ZoneName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-ecr/protocols/Aws_json1_1.ts b/clients/client-ecr/protocols/Aws_json1_1.ts
index df9724ba9802a..72715bf208da6 100644
--- a/clients/client-ecr/protocols/Aws_json1_1.ts
+++ b/clients/client-ecr/protocols/Aws_json1_1.ts
@@ -3848,7 +3848,11 @@ const serializeAws_json1_1BatchedOperationLayerDigestList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CompleteLayerUploadRequest = (
@@ -4040,7 +4044,11 @@ const serializeAws_json1_1GetAuthorizationTokenRegistryIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetAuthorizationTokenRequest = (
@@ -4154,9 +4162,11 @@ const serializeAws_json1_1ImageIdentifierList = (
   input: Array<ImageIdentifier>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ImageIdentifier(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ImageIdentifier(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ImageScanningConfiguration = (
@@ -4188,7 +4198,11 @@ const serializeAws_json1_1LayerDigestList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LifecyclePolicyPreviewFilter = (
@@ -4254,7 +4268,11 @@ const serializeAws_json1_1MediaTypeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutImageRequest = (
@@ -4337,7 +4355,11 @@ const serializeAws_json1_1RepositoryNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SetRepositoryPolicyRequest = (
@@ -4412,14 +4434,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-ecs/protocols/Aws_json1_1.ts b/clients/client-ecs/protocols/Aws_json1_1.ts
index 6f2b5b73bc775..852db35700f6a 100644
--- a/clients/client-ecs/protocols/Aws_json1_1.ts
+++ b/clients/client-ecs/protocols/Aws_json1_1.ts
@@ -6231,9 +6231,11 @@ const serializeAws_json1_1AttachmentStateChanges = (
   input: Array<AttachmentStateChange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AttachmentStateChange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AttachmentStateChange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Attribute = (
@@ -6260,9 +6262,11 @@ const serializeAws_json1_1Attributes = (
   input: Array<Attribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Attribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Attribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutoScalingGroupProvider = (
@@ -6313,16 +6317,24 @@ const serializeAws_json1_1CapacityProviderFieldList = (
   input: Array<CapacityProviderField | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CapacityProviderStrategy = (
   input: Array<CapacityProviderStrategyItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CapacityProviderStrategyItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1CapacityProviderStrategyItem(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CapacityProviderStrategyItem = (
@@ -6346,7 +6358,11 @@ const serializeAws_json1_1ClusterFieldList = (
   input: Array<ClusterField | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ClusterSetting = (
@@ -6367,16 +6383,22 @@ const serializeAws_json1_1ClusterSettings = (
   input: Array<ClusterSetting>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ClusterSetting(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ClusterSetting(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CompatibilityList = (
   input: Array<Compatibility | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContainerDefinition = (
@@ -6574,18 +6596,22 @@ const serializeAws_json1_1ContainerDefinitions = (
   input: Array<ContainerDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ContainerDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ContainerDefinition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContainerDependencies = (
   input: Array<ContainerDependency>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ContainerDependency(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ContainerDependency(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContainerDependency = (
@@ -6606,7 +6632,11 @@ const serializeAws_json1_1ContainerInstanceFieldList = (
   input: Array<ContainerInstanceField | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContainerOverride = (
@@ -6653,9 +6683,11 @@ const serializeAws_json1_1ContainerOverrides = (
   input: Array<ContainerOverride>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ContainerOverride(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ContainerOverride(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContainerStateChange = (
@@ -6694,9 +6726,11 @@ const serializeAws_json1_1ContainerStateChanges = (
   input: Array<ContainerStateChange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ContainerStateChange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ContainerStateChange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateCapacityProviderRequest = (
@@ -7226,14 +7260,22 @@ const serializeAws_json1_1DeviceCgroupPermissions = (
   input: Array<DeviceCgroupPermission | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DevicesList = (
   input: Array<Device>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Device(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Device(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DiscoverPollEndpointRequest = (
@@ -7305,9 +7347,11 @@ const serializeAws_json1_1EnvironmentVariables = (
   input: Array<KeyValuePair>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1KeyValuePair(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1KeyValuePair(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FirelensConfiguration = (
@@ -7382,9 +7426,11 @@ const serializeAws_json1_1HostEntryList = (
   input: Array<HostEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1HostEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1HostEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1HostVolumeProperties = (
@@ -7430,18 +7476,24 @@ const serializeAws_json1_1InferenceAcceleratorOverrides = (
   input: Array<InferenceAcceleratorOverride>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InferenceAcceleratorOverride(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1InferenceAcceleratorOverride(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InferenceAccelerators = (
   input: Array<InferenceAccelerator>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InferenceAccelerator(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InferenceAccelerator(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1KernelCapabilities = (
@@ -7732,9 +7784,11 @@ const serializeAws_json1_1LoadBalancers = (
   input: Array<LoadBalancer>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1LoadBalancer(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1LoadBalancer(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LogConfiguration = (
@@ -7812,9 +7866,11 @@ const serializeAws_json1_1MountPointList = (
   input: Array<MountPoint>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MountPoint(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MountPoint(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1NetworkBinding = (
@@ -7841,9 +7897,11 @@ const serializeAws_json1_1NetworkBindings = (
   input: Array<NetworkBinding>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1NetworkBinding(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1NetworkBinding(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1NetworkConfiguration = (
@@ -7878,18 +7936,22 @@ const serializeAws_json1_1PlacementConstraints = (
   input: Array<PlacementConstraint>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PlacementConstraint(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PlacementConstraint(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PlacementStrategies = (
   input: Array<PlacementStrategy>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PlacementStrategy(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PlacementStrategy(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PlacementStrategy = (
@@ -7924,9 +7986,11 @@ const serializeAws_json1_1PlatformDevices = (
   input: Array<PlatformDevice>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PlatformDevice(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PlatformDevice(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PortMapping = (
@@ -7950,9 +8014,11 @@ const serializeAws_json1_1PortMappingList = (
   input: Array<PortMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PortMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PortMapping(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProxyConfiguration = (
@@ -7979,9 +8045,11 @@ const serializeAws_json1_1ProxyConfigurationProperties = (
   input: Array<KeyValuePair>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1KeyValuePair(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1KeyValuePair(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutAccountSettingDefaultRequest = (
@@ -8242,18 +8310,22 @@ const serializeAws_json1_1ResourceRequirements = (
   input: Array<ResourceRequirement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResourceRequirement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ResourceRequirement(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Resources = (
   input: Array<Resource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Resource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Resource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RunTaskRequest = (
@@ -8365,23 +8437,33 @@ const serializeAws_json1_1SecretList = (
   input: Array<Secret>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Secret(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Secret(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServiceFieldList = (
   input: Array<ServiceField | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServiceRegistries = (
   input: Array<ServiceRegistry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServiceRegistry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ServiceRegistry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServiceRegistry = (
@@ -8477,7 +8559,11 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StringMap = (
@@ -8608,9 +8694,11 @@ const serializeAws_json1_1SystemControls = (
   input: Array<SystemControl>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SystemControl(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SystemControl(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -8628,7 +8716,11 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -8649,14 +8741,22 @@ const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TaskDefinitionFieldList = (
   input: Array<TaskDefinitionField | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TaskDefinitionPlacementConstraint = (
@@ -8677,16 +8777,24 @@ const serializeAws_json1_1TaskDefinitionPlacementConstraints = (
   input: Array<TaskDefinitionPlacementConstraint>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TaskDefinitionPlacementConstraint(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1TaskDefinitionPlacementConstraint(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TaskFieldList = (
   input: Array<TaskField | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TaskOverride = (
@@ -8747,7 +8855,11 @@ const serializeAws_json1_1TmpfsList = (
   input: Array<Tmpfs>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tmpfs(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tmpfs(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Ulimit = (
@@ -8771,7 +8883,11 @@ const serializeAws_json1_1UlimitList = (
   input: Array<Ulimit>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Ulimit(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Ulimit(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceRequest = (
@@ -8998,16 +9114,22 @@ const serializeAws_json1_1VolumeFromList = (
   input: Array<VolumeFrom>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1VolumeFrom(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1VolumeFrom(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1VolumeList = (
   input: Array<Volume>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Volume(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Volume(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AccessDeniedException = (
diff --git a/clients/client-efs/protocols/Aws_restJson1_1.ts b/clients/client-efs/protocols/Aws_restJson1_1.ts
index 495e6a302f3fc..cb8aa5d198c9e 100644
--- a/clients/client-efs/protocols/Aws_restJson1_1.ts
+++ b/clients/client-efs/protocols/Aws_restJson1_1.ts
@@ -3875,9 +3875,11 @@ const serializeAws_restJson1_1LifecyclePolicies = (
   input: Array<LifecyclePolicy>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1LifecyclePolicy(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1LifecyclePolicy(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LifecyclePolicy = (
@@ -3932,14 +3934,22 @@ const serializeAws_restJson1_1SecondaryGids = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SecurityGroups = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tag = (
@@ -3960,16 +3970,22 @@ const serializeAws_restJson1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1AccessPointDescription = (
diff --git a/clients/client-eks/protocols/Aws_restJson1_1.ts b/clients/client-eks/protocols/Aws_restJson1_1.ts
index bf4d5ba5aa916..cce9e179ef655 100644
--- a/clients/client-eks/protocols/Aws_restJson1_1.ts
+++ b/clients/client-eks/protocols/Aws_restJson1_1.ts
@@ -3431,9 +3431,13 @@ const serializeAws_restJson1_1FargateProfileSelectors = (
   input: Array<FargateProfileSelector>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1FargateProfileSelector(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1FargateProfileSelector(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LogSetup = (
@@ -3457,16 +3461,22 @@ const serializeAws_restJson1_1LogSetups = (
   input: Array<LogSetup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1LogSetup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1LogSetup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LogTypes = (
   input: Array<LogType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Logging = (
@@ -3521,7 +3531,11 @@ const serializeAws_restJson1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
@@ -3591,7 +3605,11 @@ const serializeAws_restJson1_1labelsKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1labelsMap = (
diff --git a/clients/client-elastic-beanstalk/protocols/Aws_query.ts b/clients/client-elastic-beanstalk/protocols/Aws_query.ts
index 52622ab92f38f..5aa820f1f4dc6 100644
--- a/clients/client-elastic-beanstalk/protocols/Aws_query.ts
+++ b/clients/client-elastic-beanstalk/protocols/Aws_query.ts
@@ -4375,10 +4375,10 @@ const serializeAws_queryApplicationNamesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4532,7 +4532,7 @@ const serializeAws_queryConfigurationOptionSettingsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryConfigurationOptionSetting(
       entry,
       context
@@ -4541,7 +4541,7 @@ const serializeAws_queryConfigurationOptionSettingsList = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5181,10 +5181,10 @@ const serializeAws_queryEnvironmentHealthAttributes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5194,10 +5194,10 @@ const serializeAws_queryEnvironmentIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5207,10 +5207,10 @@ const serializeAws_queryEnvironmentNamesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5237,10 +5237,10 @@ const serializeAws_queryInstancesHealthAttributes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5336,13 +5336,13 @@ const serializeAws_queryOptionsSpecifierList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryOptionSpecification(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5376,10 +5376,10 @@ const serializeAws_queryPlatformFilterValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5389,13 +5389,13 @@ const serializeAws_queryPlatformFilters = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryPlatformFilter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5543,10 +5543,10 @@ const serializeAws_queryTagKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5556,13 +5556,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5572,13 +5572,13 @@ const serializeAws_queryTags = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5817,10 +5817,10 @@ const serializeAws_queryVersionLabels = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5830,10 +5830,10 @@ const serializeAws_queryVersionLabelsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-elastic-load-balancing-v2/protocols/Aws_query.ts b/clients/client-elastic-load-balancing-v2/protocols/Aws_query.ts
index a7aee6c0d04be..c445e4d58b8f4 100644
--- a/clients/client-elastic-load-balancing-v2/protocols/Aws_query.ts
+++ b/clients/client-elastic-load-balancing-v2/protocols/Aws_query.ts
@@ -4754,13 +4754,13 @@ const serializeAws_queryActions = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryAction(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4948,13 +4948,13 @@ const serializeAws_queryCertificateList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryCertificate(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5539,10 +5539,10 @@ const serializeAws_queryListOfString = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5552,10 +5552,10 @@ const serializeAws_queryListenerArns = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5565,10 +5565,10 @@ const serializeAws_queryLoadBalancerArns = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5592,7 +5592,7 @@ const serializeAws_queryLoadBalancerAttributes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryLoadBalancerAttribute(
       entry,
       context
@@ -5601,7 +5601,7 @@ const serializeAws_queryLoadBalancerAttributes = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5611,10 +5611,10 @@ const serializeAws_queryLoadBalancerNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5834,7 +5834,7 @@ const serializeAws_queryQueryStringKeyValuePairList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryQueryStringKeyValuePair(
       entry,
       context
@@ -5843,7 +5843,7 @@ const serializeAws_queryQueryStringKeyValuePairList = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5946,10 +5946,10 @@ const serializeAws_queryResourceArns = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5959,10 +5959,10 @@ const serializeAws_queryRuleArns = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6050,13 +6050,13 @@ const serializeAws_queryRuleConditionList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryRuleCondition(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6066,13 +6066,13 @@ const serializeAws_queryRulePriorityList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryRulePriorityPair(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6096,10 +6096,10 @@ const serializeAws_querySecurityGroups = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6205,10 +6205,10 @@ const serializeAws_querySslPolicyNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6235,13 +6235,13 @@ const serializeAws_querySubnetMappings = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_querySubnetMapping(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6251,10 +6251,10 @@ const serializeAws_querySubnets = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6275,10 +6275,10 @@ const serializeAws_queryTagKeys = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6288,13 +6288,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6321,13 +6321,13 @@ const serializeAws_queryTargetDescriptions = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTargetDescription(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6337,10 +6337,10 @@ const serializeAws_queryTargetGroupArns = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6364,7 +6364,7 @@ const serializeAws_queryTargetGroupAttributes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTargetGroupAttribute(
       entry,
       context
@@ -6373,7 +6373,7 @@ const serializeAws_queryTargetGroupAttributes = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6383,13 +6383,13 @@ const serializeAws_queryTargetGroupList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTargetGroupTuple(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6399,10 +6399,10 @@ const serializeAws_queryTargetGroupNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -6556,8 +6556,8 @@ const deserializeAws_queryAuthenticateCognitoActionAuthenticationRequestExtraPar
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
@@ -6622,8 +6622,8 @@ const deserializeAws_queryAuthenticateOidcActionAuthenticationRequestExtraParams
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
diff --git a/clients/client-elastic-load-balancing/protocols/Aws_query.ts b/clients/client-elastic-load-balancing/protocols/Aws_query.ts
index f52bc5015fb1d..776aefbf880ec 100644
--- a/clients/client-elastic-load-balancing/protocols/Aws_query.ts
+++ b/clients/client-elastic-load-balancing/protocols/Aws_query.ts
@@ -3574,13 +3574,13 @@ const serializeAws_queryAdditionalAttributes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryAdditionalAttribute(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3629,10 +3629,10 @@ const serializeAws_queryAvailabilityZones = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4073,13 +4073,13 @@ const serializeAws_queryInstances = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryInstance(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4112,13 +4112,13 @@ const serializeAws_queryListeners = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryListener(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4183,10 +4183,10 @@ const serializeAws_queryLoadBalancerNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4196,10 +4196,10 @@ const serializeAws_queryLoadBalancerNamesMax20 = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4244,13 +4244,13 @@ const serializeAws_queryPolicyAttributes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryPolicyAttribute(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4260,10 +4260,10 @@ const serializeAws_queryPolicyNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4273,10 +4273,10 @@ const serializeAws_queryPolicyTypeNames = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4286,10 +4286,10 @@ const serializeAws_queryPorts = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4363,10 +4363,10 @@ const serializeAws_querySecurityGroups = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4441,10 +4441,10 @@ const serializeAws_querySubnets = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4465,13 +4465,13 @@ const serializeAws_queryTagKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTagKeyOnly(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4492,13 +4492,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-elastic-transcoder/protocols/Aws_restJson1_1.ts b/clients/client-elastic-transcoder/protocols/Aws_restJson1_1.ts
index 44297b725ce0a..5b498f7d54846 100644
--- a/clients/client-elastic-transcoder/protocols/Aws_restJson1_1.ts
+++ b/clients/client-elastic-transcoder/protocols/Aws_restJson1_1.ts
@@ -2625,7 +2625,11 @@ const serializeAws_restJson1_1AccessControls = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Artwork = (
@@ -2664,9 +2668,11 @@ const serializeAws_restJson1_1Artworks = (
   input: Array<Artwork>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Artwork(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Artwork(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AudioCodecOptions = (
@@ -2742,9 +2748,11 @@ const serializeAws_restJson1_1CaptionFormats = (
   input: Array<CaptionFormat>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CaptionFormat(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CaptionFormat(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CaptionSource = (
@@ -2777,9 +2785,11 @@ const serializeAws_restJson1_1CaptionSources = (
   input: Array<CaptionSource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CaptionSource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CaptionSource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Captions = (
@@ -2834,9 +2844,11 @@ const serializeAws_restJson1_1Composition = (
   input: Array<Clip>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Clip(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Clip(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CreateJobOutput = (
@@ -2902,9 +2914,11 @@ const serializeAws_restJson1_1CreateJobOutputs = (
   input: Array<CreateJobOutput>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CreateJobOutput(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CreateJobOutput(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CreateJobPlaylist = (
@@ -2945,9 +2959,11 @@ const serializeAws_restJson1_1CreateJobPlaylists = (
   input: Array<CreateJobPlaylist>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CreateJobPlaylist(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CreateJobPlaylist(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DetectedProperties = (
@@ -3109,9 +3125,11 @@ const serializeAws_restJson1_1JobInputs = (
   input: Array<JobInput>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1JobInput(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1JobInput(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1JobWatermark = (
@@ -3138,9 +3156,11 @@ const serializeAws_restJson1_1JobWatermarks = (
   input: Array<JobWatermark>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1JobWatermark(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1JobWatermark(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Notifications = (
@@ -3167,7 +3187,11 @@ const serializeAws_restJson1_1OutputKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Permission = (
@@ -3194,9 +3218,11 @@ const serializeAws_restJson1_1Permissions = (
   input: Array<Permission>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Permission(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Permission(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PipelineOutputConfig = (
@@ -3287,16 +3313,22 @@ const serializeAws_restJson1_1PresetWatermarks = (
   input: Array<PresetWatermark>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1PresetWatermark(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1PresetWatermark(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SnsTopics = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Thumbnails = (
diff --git a/clients/client-elasticache/protocols/Aws_query.ts b/clients/client-elasticache/protocols/Aws_query.ts
index 6607217fb18dd..9e0753588532f 100644
--- a/clients/client-elasticache/protocols/Aws_query.ts
+++ b/clients/client-elasticache/protocols/Aws_query.ts
@@ -7197,10 +7197,10 @@ const serializeAws_queryAvailabilityZonesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AvailabilityZone.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7272,10 +7272,10 @@ const serializeAws_queryCacheClusterIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7285,10 +7285,10 @@ const serializeAws_queryCacheNodeIdsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`CacheNodeId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7298,10 +7298,10 @@ const serializeAws_queryCacheSecurityGroupNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`CacheSecurityGroupName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7701,7 +7701,7 @@ const serializeAws_queryCustomerNodeEndpointList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryCustomerNodeEndpoint(
       entry,
       context
@@ -7710,7 +7710,7 @@ const serializeAws_queryCustomerNodeEndpointList = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8235,10 +8235,10 @@ const serializeAws_queryKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8570,7 +8570,7 @@ const serializeAws_queryNodeGroupConfigurationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryNodeGroupConfiguration(
       entry,
       context
@@ -8579,7 +8579,7 @@ const serializeAws_queryNodeGroupConfigurationList = (
       entries[`NodeGroupConfiguration.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8589,10 +8589,10 @@ const serializeAws_queryNodeGroupsToRemoveList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`NodeGroupToRemove.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8602,10 +8602,10 @@ const serializeAws_queryNodeGroupsToRetainList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`NodeGroupToRetain.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8629,13 +8629,13 @@ const serializeAws_queryParameterNameValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryParameterNameValue(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`ParameterNameValue.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8645,10 +8645,10 @@ const serializeAws_queryPreferredAvailabilityZoneList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`PreferredAvailabilityZone.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8697,10 +8697,10 @@ const serializeAws_queryRemoveReplicasList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8728,13 +8728,13 @@ const serializeAws_queryReplicaConfigurationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryConfigureShard(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`ConfigureShard.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8744,10 +8744,10 @@ const serializeAws_queryReplicationGroupIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8802,7 +8802,7 @@ const serializeAws_queryReshardingConfigurationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryReshardingConfiguration(
       entry,
       context
@@ -8811,7 +8811,7 @@ const serializeAws_queryReshardingConfigurationList = (
       entries[`ReshardingConfiguration.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8838,10 +8838,10 @@ const serializeAws_querySecurityGroupIdsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SecurityGroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8851,10 +8851,10 @@ const serializeAws_queryServiceUpdateStatusList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8864,10 +8864,10 @@ const serializeAws_querySnapshotArnsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SnapshotArn.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8898,10 +8898,10 @@ const serializeAws_querySubnetIdentifierList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SubnetIdentifier.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8922,13 +8922,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Tag.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8966,10 +8966,10 @@ const serializeAws_queryUpdateActionStatusList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-elasticsearch-service/protocols/Aws_restJson1_1.ts b/clients/client-elasticsearch-service/protocols/Aws_restJson1_1.ts
index 478e01adb4832..22fc5d07b3e63 100644
--- a/clients/client-elasticsearch-service/protocols/Aws_restJson1_1.ts
+++ b/clients/client-elasticsearch-service/protocols/Aws_restJson1_1.ts
@@ -3340,7 +3340,11 @@ const serializeAws_restJson1_1DomainNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1EBSOptions = (
@@ -3474,7 +3478,11 @@ const serializeAws_restJson1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tag = (
@@ -3495,9 +3503,11 @@ const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1VPCOptions = (
diff --git a/clients/client-emr/protocols/Aws_json1_1.ts b/clients/client-emr/protocols/Aws_json1_1.ts
index 6765ec60450c1..f2fcc2d2661f4 100644
--- a/clients/client-emr/protocols/Aws_json1_1.ts
+++ b/clients/client-emr/protocols/Aws_json1_1.ts
@@ -2815,9 +2815,11 @@ const serializeAws_json1_1ApplicationList = (
   input: Array<Application>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Application(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Application(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutoScalingPolicy = (
@@ -2898,9 +2900,11 @@ const serializeAws_json1_1BootstrapActionConfigList = (
   input: Array<BootstrapActionConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1BootstrapActionConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1BootstrapActionConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CancelStepsInput = (
@@ -2965,7 +2969,11 @@ const serializeAws_json1_1ClusterStateList = (
   input: Array<ClusterState | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Configuration = (
@@ -2995,9 +3003,11 @@ const serializeAws_json1_1ConfigurationList = (
   input: Array<Configuration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Configuration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Configuration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateSecurityConfigurationInput = (
@@ -3095,14 +3105,22 @@ const serializeAws_json1_1EC2InstanceIdsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EC2InstanceIdsToTerminateList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EbsBlockDeviceConfig = (
@@ -3126,9 +3144,11 @@ const serializeAws_json1_1EbsBlockDeviceConfigList = (
   input: Array<EbsBlockDeviceConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EbsBlockDeviceConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EbsBlockDeviceConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EbsConfiguration = (
@@ -3221,9 +3241,11 @@ const serializeAws_json1_1InstanceFleetConfigList = (
   input: Array<InstanceFleetConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InstanceFleetConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InstanceFleetConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceFleetModifyConfig = (
@@ -3307,9 +3329,11 @@ const serializeAws_json1_1InstanceGroupConfigList = (
   input: Array<InstanceGroupConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InstanceGroupConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InstanceGroupConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceGroupModifyConfig = (
@@ -3350,16 +3374,24 @@ const serializeAws_json1_1InstanceGroupModifyConfigList = (
   input: Array<InstanceGroupModifyConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InstanceGroupModifyConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1InstanceGroupModifyConfig(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceGroupTypeList = (
   input: Array<InstanceGroupType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceResizePolicy = (
@@ -3389,7 +3421,11 @@ const serializeAws_json1_1InstanceStateList = (
   input: Array<InstanceState | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceTypeConfig = (
@@ -3429,16 +3465,22 @@ const serializeAws_json1_1InstanceTypeConfigList = (
   input: Array<InstanceTypeConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InstanceTypeConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InstanceTypeConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1JobFlowExecutionStateList = (
   input: Array<JobFlowExecutionState | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1JobFlowInstancesConfig = (
@@ -3567,9 +3609,11 @@ const serializeAws_json1_1KeyValueList = (
   input: Array<KeyValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1KeyValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1KeyValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListBootstrapActionsInput = (
@@ -3733,9 +3777,11 @@ const serializeAws_json1_1MetricDimensionList = (
   input: Array<MetricDimension>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MetricDimension(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MetricDimension(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ModifyClusterInput = (
@@ -3792,9 +3838,11 @@ const serializeAws_json1_1NewSupportedProductsList = (
   input: Array<SupportedProductConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SupportedProductConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SupportedProductConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PlacementType = (
@@ -3834,9 +3882,11 @@ const serializeAws_json1_1PortRanges = (
   input: Array<PortRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PortRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PortRange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutAutoScalingPolicyInput = (
@@ -4077,9 +4127,11 @@ const serializeAws_json1_1ScalingRuleList = (
   input: Array<ScalingRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ScalingRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ScalingRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ScalingTrigger = (
@@ -4116,7 +4168,11 @@ const serializeAws_json1_1SecurityGroupsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SetTerminationProtectionInput = (
@@ -4230,30 +4286,44 @@ const serializeAws_json1_1StepConfigList = (
   input: Array<StepConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1StepConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1StepConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StepIdsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StepStateList = (
   input: Array<StepState | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StringMap = (
@@ -4285,7 +4355,11 @@ const serializeAws_json1_1SupportedProductsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -4303,7 +4377,11 @@ const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TerminateJobFlowsInput = (
@@ -4341,14 +4419,22 @@ const serializeAws_json1_1XmlStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1XmlStringMaxLen256List = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AddInstanceFleetOutput = (
diff --git a/clients/client-eventbridge/protocols/Aws_json1_1.ts b/clients/client-eventbridge/protocols/Aws_json1_1.ts
index 05de208e42edc..94728fec1ef55 100644
--- a/clients/client-eventbridge/protocols/Aws_json1_1.ts
+++ b/clients/client-eventbridge/protocols/Aws_json1_1.ts
@@ -3469,7 +3469,11 @@ const serializeAws_json1_1EventResourceList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InputTransformer = (
@@ -3700,9 +3704,11 @@ const serializeAws_json1_1PutEventsRequestEntryList = (
   input: Array<PutEventsRequestEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PutEventsRequestEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PutEventsRequestEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutPartnerEventsRequest = (
@@ -3751,9 +3757,13 @@ const serializeAws_json1_1PutPartnerEventsRequestEntryList = (
   input: Array<PutPartnerEventsRequestEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PutPartnerEventsRequestEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1PutPartnerEventsRequestEntry(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutPermissionRequest = (
@@ -3903,16 +3913,22 @@ const serializeAws_json1_1RunCommandTargetValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RunCommandTargets = (
   input: Array<RunCommandTarget>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RunCommandTarget(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RunCommandTarget(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SqsParameters = (
@@ -3930,7 +3946,11 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -3948,14 +3968,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -4037,14 +4065,22 @@ const serializeAws_json1_1TargetIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetList = (
   input: Array<Target>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Target(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Target(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TestEventPatternRequest = (
diff --git a/clients/client-firehose/protocols/Aws_json1_1.ts b/clients/client-firehose/protocols/Aws_json1_1.ts
index d74467750ba02..ddba5ee77f253 100644
--- a/clients/client-firehose/protocols/Aws_json1_1.ts
+++ b/clients/client-firehose/protocols/Aws_json1_1.ts
@@ -2065,14 +2065,22 @@ const serializeAws_json1_1ListOfNonEmptyStrings = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListOfNonEmptyStringsWithoutWhitespace = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListTagsForDeliveryStreamInput = (
@@ -2238,9 +2246,11 @@ const serializeAws_json1_1ProcessorList = (
   input: Array<Processor>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Processor(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Processor(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProcessorParameter = (
@@ -2261,9 +2271,11 @@ const serializeAws_json1_1ProcessorParameterList = (
   input: Array<ProcessorParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProcessorParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProcessorParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutRecordBatchInput = (
@@ -2287,9 +2299,11 @@ const serializeAws_json1_1PutRecordBatchRequestEntryList = (
   input: Array<_Record>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1_Record(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1_Record(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutRecordInput = (
@@ -2773,14 +2787,22 @@ const serializeAws_json1_1TagDeliveryStreamInputTagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagDeliveryStreamInput = (
diff --git a/clients/client-fms/protocols/Aws_json1_1.ts b/clients/client-fms/protocols/Aws_json1_1.ts
index 70722ae7c5d06..514d755b502d2 100644
--- a/clients/client-fms/protocols/Aws_json1_1.ts
+++ b/clients/client-fms/protocols/Aws_json1_1.ts
@@ -1906,7 +1906,11 @@ const serializeAws_json1_1CustomerPolicyScopeIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CustomerPolicyScopeMap = (
@@ -2180,16 +2184,22 @@ const serializeAws_json1_1ResourceTags = (
   input: Array<ResourceTag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResourceTag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ResourceTag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceTypeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SecurityServicePolicyData = (
@@ -2221,14 +2231,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-forecast/protocols/Aws_json1_1.ts b/clients/client-forecast/protocols/Aws_json1_1.ts
index c5fc6c8fa3f4b..ae070bf48c270 100644
--- a/clients/client-forecast/protocols/Aws_json1_1.ts
+++ b/clients/client-forecast/protocols/Aws_json1_1.ts
@@ -2721,7 +2721,11 @@ const serializeAws_json1_1ArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CategoricalParameterRange = (
@@ -2742,9 +2746,13 @@ const serializeAws_json1_1CategoricalParameterRanges = (
   input: Array<CategoricalParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CategoricalParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1CategoricalParameterRange(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContinuousParameterRange = (
@@ -2771,9 +2779,11 @@ const serializeAws_json1_1ContinuousParameterRanges = (
   input: Array<ContinuousParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ContinuousParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ContinuousParameterRange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateDatasetGroupRequest = (
@@ -3213,18 +3223,22 @@ const serializeAws_json1_1FeaturizationPipeline = (
   input: Array<FeaturizationMethod>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1FeaturizationMethod(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1FeaturizationMethod(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Featurizations = (
   input: Array<Featurization>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Featurization(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Featurization(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filter = (
@@ -3248,21 +3262,33 @@ const serializeAws_json1_1Filters = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ForecastDimensions = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ForecastTypes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetAccuracyMetricsRequest = (
@@ -3333,9 +3359,11 @@ const serializeAws_json1_1IntegerParameterRanges = (
   input: Array<IntegerParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IntegerParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1IntegerParameterRange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListDatasetGroupsRequest = (
@@ -3515,9 +3543,11 @@ const serializeAws_json1_1SchemaAttributes = (
   input: Array<SchemaAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SchemaAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SchemaAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SupplementaryFeature = (
@@ -3538,9 +3568,11 @@ const serializeAws_json1_1SupplementaryFeatures = (
   input: Array<SupplementaryFeature>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SupplementaryFeature(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SupplementaryFeature(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TrainingParameters = (
@@ -3575,7 +3607,11 @@ const serializeAws_json1_1Values = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1ArnList = (
diff --git a/clients/client-frauddetector/protocols/Aws_json1_1.ts b/clients/client-frauddetector/protocols/Aws_json1_1.ts
index ee093987a0919..43a5d079356f3 100644
--- a/clients/client-frauddetector/protocols/Aws_json1_1.ts
+++ b/clients/client-frauddetector/protocols/Aws_json1_1.ts
@@ -3728,16 +3728,22 @@ const serializeAws_json1_1ListOfModelVersions = (
   input: Array<ModelVersion>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ModelVersion(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ModelVersion(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListOfStrings = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ModelEndpointDataBlob = (
@@ -3819,9 +3825,11 @@ const serializeAws_json1_1ModelVariablesList = (
   input: Array<ModelVariable>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ModelVariable(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ModelVariable(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ModelVersion = (
@@ -3845,14 +3853,22 @@ const serializeAws_json1_1NameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1NonEmptyListOfStrings = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutDetectorRequest = (
@@ -3989,7 +4005,11 @@ const serializeAws_json1_1RuleList = (
   input: Array<Rule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Rule(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Rule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TrainingDataSource = (
@@ -4185,9 +4205,11 @@ const serializeAws_json1_1VariableEntryList = (
   input: Array<VariableEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1VariableEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1VariableEntry(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1BatchCreateVariableError = (
diff --git a/clients/client-fsx/protocols/Aws_json1_1.ts b/clients/client-fsx/protocols/Aws_json1_1.ts
index 28cab25ae33a9..b689f279b1b88 100644
--- a/clients/client-fsx/protocols/Aws_json1_1.ts
+++ b/clients/client-fsx/protocols/Aws_json1_1.ts
@@ -2205,7 +2205,11 @@ const serializeAws_json1_1BackupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CancelDataRepositoryTaskRequest = (
@@ -2471,23 +2475,33 @@ const serializeAws_json1_1DataRepositoryTaskFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DataRepositoryTaskFilters = (
   input: Array<DataRepositoryTaskFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DataRepositoryTaskFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DataRepositoryTaskFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DataRepositoryTaskPaths = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteBackupRequest = (
@@ -2619,14 +2633,22 @@ const serializeAws_json1_1DnsIps = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FileSystemIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filter = (
@@ -2650,14 +2672,22 @@ const serializeAws_json1_1FilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filters = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListTagsForResourceRequest = (
@@ -2681,7 +2711,11 @@ const serializeAws_json1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SelfManagedActiveDirectoryConfiguration = (
@@ -2733,7 +2767,11 @@ const serializeAws_json1_1SubnetIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -2751,7 +2789,11 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -2772,14 +2814,22 @@ const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TaskIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceRequest = (
diff --git a/clients/client-gamelift/protocols/Aws_json1_1.ts b/clients/client-gamelift/protocols/Aws_json1_1.ts
index 0758128ddf76a..e3ddba56bf6d6 100644
--- a/clients/client-gamelift/protocols/Aws_json1_1.ts
+++ b/clients/client-gamelift/protocols/Aws_json1_1.ts
@@ -10075,23 +10075,33 @@ const serializeAws_json1_1DesiredPlayerSessionList = (
   input: Array<DesiredPlayerSession>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DesiredPlayerSession(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DesiredPlayerSession(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FleetActionList = (
   input: Array<FleetAction | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FleetIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GameProperty = (
@@ -10112,9 +10122,11 @@ const serializeAws_json1_1GamePropertyList = (
   input: Array<GameProperty>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1GameProperty(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1GameProperty(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GameSessionQueueDestination = (
@@ -10132,16 +10144,24 @@ const serializeAws_json1_1GameSessionQueueDestinationList = (
   input: Array<GameSessionQueueDestination>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1GameSessionQueueDestination(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1GameSessionQueueDestination(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GameSessionQueueNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetGameSessionLogUrlInput = (
@@ -10193,9 +10213,11 @@ const serializeAws_json1_1IpPermissionsList = (
   input: Array<IpPermission>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IpPermission(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1IpPermission(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LatencyMap = (
@@ -10295,28 +10317,44 @@ const serializeAws_json1_1MatchmakingConfigurationNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MatchmakingIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MatchmakingRuleSetNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MetricGroupList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Player = (
@@ -10371,7 +10409,11 @@ const serializeAws_json1_1PlayerIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PlayerLatency = (
@@ -10395,9 +10437,11 @@ const serializeAws_json1_1PlayerLatencyList = (
   input: Array<PlayerLatency>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PlayerLatency(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PlayerLatency(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PlayerLatencyPolicy = (
@@ -10419,16 +10463,22 @@ const serializeAws_json1_1PlayerLatencyPolicyList = (
   input: Array<PlayerLatencyPolicy>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PlayerLatencyPolicy(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PlayerLatencyPolicy(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PlayerList = (
   input: Array<Player>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Player(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Player(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutScalingPolicyInput = (
@@ -10476,7 +10526,11 @@ const serializeAws_json1_1QueueArnsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RequestUploadCredentialsInput = (
@@ -10621,9 +10675,11 @@ const serializeAws_json1_1ServerProcessList = (
   input: Array<ServerProcess>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServerProcess(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ServerProcess(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartFleetActionsInput = (
@@ -10783,7 +10839,11 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -10801,14 +10861,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-glacier/protocols/Aws_restJson1_1.ts b/clients/client-glacier/protocols/Aws_restJson1_1.ts
index 8adebad9b2df6..198819b056cb2 100644
--- a/clients/client-glacier/protocols/Aws_restJson1_1.ts
+++ b/clients/client-glacier/protocols/Aws_restJson1_1.ts
@@ -4990,9 +4990,11 @@ const serializeAws_restJson1_1AccessControlPolicyList = (
   input: Array<Grant>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Grant(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Grant(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CSVInput = (
@@ -5253,9 +5255,11 @@ const serializeAws_restJson1_1DataRetrievalRulesList = (
   input: Array<DataRetrievalRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DataRetrievalRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DataRetrievalRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1InventoryRetrievalJobInput = (
@@ -5331,14 +5335,22 @@ const serializeAws_restJson1_1NotificationEventList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
diff --git a/clients/client-global-accelerator/protocols/Aws_json1_1.ts b/clients/client-global-accelerator/protocols/Aws_json1_1.ts
index 8013f29fde88c..a019c84aafaa5 100644
--- a/clients/client-global-accelerator/protocols/Aws_json1_1.ts
+++ b/clients/client-global-accelerator/protocols/Aws_json1_1.ts
@@ -2316,9 +2316,11 @@ const serializeAws_json1_1EndpointConfigurations = (
   input: Array<EndpointConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EndpointConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EndpointConfiguration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListAcceleratorsRequest = (
@@ -2387,9 +2389,11 @@ const serializeAws_json1_1PortRanges = (
   input: Array<PortRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PortRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PortRange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateAcceleratorAttributesRequest = (
diff --git a/clients/client-glue/protocols/Aws_json1_1.ts b/clients/client-glue/protocols/Aws_json1_1.ts
index 9a92f8eb65911..d33932af86d06 100644
--- a/clients/client-glue/protocols/Aws_json1_1.ts
+++ b/clients/client-glue/protocols/Aws_json1_1.ts
@@ -14406,14 +14406,22 @@ const serializeAws_json1_1NameStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagKeysList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagsMap = (
@@ -14498,16 +14506,22 @@ const serializeAws_json1_1BatchDeletePartitionValueList = (
   input: Array<PartitionValueList>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PartitionValueList(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PartitionValueList(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchDeleteTableNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchDeleteTableRequest = (
@@ -14534,7 +14548,11 @@ const serializeAws_json1_1BatchDeleteTableVersionList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchDeleteTableVersionRequest = (
@@ -14589,16 +14607,22 @@ const serializeAws_json1_1BatchGetPartitionValueList = (
   input: Array<PartitionValueList>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PartitionValueList(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PartitionValueList(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BoundedPartitionValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Column = (
@@ -14628,14 +14652,22 @@ const serializeAws_json1_1ColumnList = (
   input: Array<Column>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Column(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Column(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ColumnValueStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConnectionInput = (
@@ -14869,7 +14901,11 @@ const serializeAws_json1_1DeleteConnectionNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteConnectionRequest = (
@@ -15324,7 +15360,11 @@ const serializeAws_json1_1MatchCriteria = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Order = (
@@ -15345,7 +15385,11 @@ const serializeAws_json1_1OrderList = (
   input: Array<Order>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Order(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Order(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParametersMap = (
@@ -15399,9 +15443,11 @@ const serializeAws_json1_1PartitionInputList = (
   input: Array<PartitionInput>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PartitionInput(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PartitionInput(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PartitionValueList = (
@@ -15422,7 +15468,11 @@ const serializeAws_json1_1PermissionList = (
   input: Array<Permission | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PhysicalConnectionRequirements = (
@@ -15469,9 +15519,11 @@ const serializeAws_json1_1PrincipalPermissionsList = (
   input: Array<PrincipalPermissions>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PrincipalPermissions(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PrincipalPermissions(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PropertyPredicate = (
@@ -15545,18 +15597,22 @@ const serializeAws_json1_1ResourceUriList = (
   input: Array<ResourceUri>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResourceUri(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ResourceUri(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SearchPropertyPredicates = (
   input: Array<PropertyPredicate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PropertyPredicate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PropertyPredicate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SearchTablesRequest = (
@@ -15595,7 +15651,11 @@ const serializeAws_json1_1SecurityGroupIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Segment = (
@@ -15666,9 +15726,11 @@ const serializeAws_json1_1SortCriteria = (
   input: Array<SortCriterion>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SortCriterion(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SortCriterion(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SortCriterion = (
@@ -15951,7 +16013,11 @@ const serializeAws_json1_1ValueStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchGetDevEndpointsRequest = (
@@ -16103,7 +16169,11 @@ const serializeAws_json1_1DevEndpointNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EncryptionConfiguration = (
@@ -16246,7 +16316,11 @@ const serializeAws_json1_1PublicKeysList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResetJobBookmarkRequest = (
@@ -16281,16 +16355,22 @@ const serializeAws_json1_1S3EncryptionList = (
   input: Array<S3Encryption>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1S3Encryption(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1S3Encryption(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateDevEndpointRequest = (
@@ -16538,9 +16618,11 @@ const serializeAws_json1_1GlueTables = (
   input: Array<GlueTable>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1GlueTable(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1GlueTable(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SchemaColumn = (
@@ -16720,9 +16802,11 @@ const serializeAws_json1_1TransformSchema = (
   input: Array<SchemaColumn>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SchemaColumn(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SchemaColumn(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TransformSortCriteria = (
@@ -16821,7 +16905,11 @@ const serializeAws_json1_1ActionList = (
   input: Array<Action>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Action(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Action(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchGetJobsRequest = (
@@ -16873,7 +16961,11 @@ const serializeAws_json1_1BatchStopJobRunJobRunIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchStopJobRunRequest = (
@@ -16920,9 +17012,11 @@ const serializeAws_json1_1ConditionList = (
   input: Array<Condition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Condition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Condition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ConnectionsList = (
@@ -17312,7 +17406,11 @@ const serializeAws_json1_1JobNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1JobUpdate = (
@@ -17454,7 +17552,11 @@ const serializeAws_json1_1OrchestrationStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Predicate = (
@@ -17577,7 +17679,11 @@ const serializeAws_json1_1TriggerNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TriggerUpdate = (
@@ -17669,7 +17775,11 @@ const serializeAws_json1_1WorkflowNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1WorkflowRunProperties = (
@@ -17701,9 +17811,11 @@ const serializeAws_json1_1CatalogEntries = (
   input: Array<CatalogEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CatalogEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CatalogEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CatalogEntry = (
@@ -17724,7 +17836,11 @@ const serializeAws_json1_1CatalogTablesList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CatalogTarget = (
@@ -17748,16 +17864,22 @@ const serializeAws_json1_1CatalogTargetList = (
   input: Array<CatalogTarget>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CatalogTarget(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CatalogTarget(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ClassifierNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CodeGenEdge = (
@@ -17821,16 +17943,22 @@ const serializeAws_json1_1CodeGenNodeArgs = (
   input: Array<CodeGenNodeArg>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CodeGenNodeArg(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CodeGenNodeArg(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CrawlerNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CrawlerTargets = (
@@ -18066,25 +18194,33 @@ const serializeAws_json1_1CsvHeader = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DagEdges = (
   input: Array<CodeGenEdge>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CodeGenEdge(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CodeGenEdge(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DagNodes = (
   input: Array<CodeGenNode>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CodeGenNode(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CodeGenNode(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteClassifierRequest = (
@@ -18124,9 +18260,11 @@ const serializeAws_json1_1DynamoDBTargetList = (
   input: Array<DynamoDBTarget>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DynamoDBTarget(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DynamoDBTarget(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetClassifierRequest = (
@@ -18295,9 +18433,11 @@ const serializeAws_json1_1JdbcTargetList = (
   input: Array<JdbcTarget>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1JdbcTarget(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1JdbcTarget(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListCrawlersRequest = (
@@ -18370,16 +18510,22 @@ const serializeAws_json1_1MappingList = (
   input: Array<MappingEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MappingEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MappingEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PathList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1S3Target = (
@@ -18403,9 +18549,11 @@ const serializeAws_json1_1S3TargetList = (
   input: Array<S3Target>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1S3Target(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1S3Target(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SchemaChangePolicy = (
diff --git a/clients/client-greengrass/protocols/Aws_restJson1_1.ts b/clients/client-greengrass/protocols/Aws_restJson1_1.ts
index 068164d59759c..8a5858125fa36 100644
--- a/clients/client-greengrass/protocols/Aws_restJson1_1.ts
+++ b/clients/client-greengrass/protocols/Aws_restJson1_1.ts
@@ -10646,95 +10646,121 @@ const serializeAws_restJson1_1UpdateTargets = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfConnectivityInfo = (
   input: Array<ConnectivityInfo>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ConnectivityInfo(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ConnectivityInfo(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfConnector = (
   input: Array<Connector>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Connector(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Connector(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfCore = (
   input: Array<Core>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Core(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Core(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfDevice = (
   input: Array<Device>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Device(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Device(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfFunction = (
   input: Array<Function>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Function(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Function(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfLogger = (
   input: Array<Logger>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Logger(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Logger(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfResource = (
   input: Array<Resource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Resource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Resource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfResourceAccessPolicy = (
   input: Array<ResourceAccessPolicy>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ResourceAccessPolicy(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ResourceAccessPolicy(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfSubscription = (
   input: Array<Subscription>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Subscription(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Subscription(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__mapOf__string = (
diff --git a/clients/client-groundstation/protocols/Aws_restJson1_1.ts b/clients/client-groundstation/protocols/Aws_restJson1_1.ts
index 28c1125b5afd3..0bcf73d2f48e4 100644
--- a/clients/client-groundstation/protocols/Aws_restJson1_1.ts
+++ b/clients/client-groundstation/protocols/Aws_restJson1_1.ts
@@ -3349,16 +3349,22 @@ const serializeAws_restJson1_1DataflowEdge = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DataflowEdgeList = (
   input: Array<Array<string>>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DataflowEdge(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DataflowEdge(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DataflowEndpoint = (
@@ -3438,16 +3444,22 @@ const serializeAws_restJson1_1EndpointDetailsList = (
   input: Array<EndpointDetails>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1EndpointDetails(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1EndpointDetails(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StatusList = (
   input: Array<ContactStatus | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TrackingConfig = (
@@ -3546,7 +3558,11 @@ const serializeAws_restJson1_1SecurityGroupIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SocketAddress = (
@@ -3590,7 +3606,11 @@ const serializeAws_restJson1_1SubnetList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagsMap = (
diff --git a/clients/client-guardduty/protocols/Aws_restJson1_1.ts b/clients/client-guardduty/protocols/Aws_restJson1_1.ts
index ebe66a0310b74..43831b0b92dde 100644
--- a/clients/client-guardduty/protocols/Aws_restJson1_1.ts
+++ b/clients/client-guardduty/protocols/Aws_restJson1_1.ts
@@ -5823,16 +5823,22 @@ const serializeAws_restJson1_1AccountDetails = (
   input: Array<AccountDetail>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AccountDetail(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AccountDetail(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AccountIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Condition = (
@@ -5914,14 +5920,22 @@ const serializeAws_restJson1_1Eq = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Equals = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FindingCriteria = (
@@ -5942,35 +5956,55 @@ const serializeAws_restJson1_1FindingIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FindingStatisticTypes = (
   input: Array<FindingStatisticType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FindingTypes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Neq = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1NotEquals = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SortCriteria = (
diff --git a/clients/client-health/protocols/Aws_json1_1.ts b/clients/client-health/protocols/Aws_json1_1.ts
index 8b1dda7e3f2d1..02ceaed8ff2e3 100644
--- a/clients/client-health/protocols/Aws_json1_1.ts
+++ b/clients/client-health/protocols/Aws_json1_1.ts
@@ -1202,84 +1202,132 @@ const serializeAws_json1_1availabilityZones = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1awsAccountIdsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1entityArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1entityStatusCodeList = (
   input: Array<EntityStatusCode | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1entityValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1eventArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1eventStatusCodeList = (
   input: Array<EventStatusCode | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1eventTypeCategoryList = (
   input: Array<EventTypeCategory | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1eventTypeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1regionList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1serviceList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1tagFilter = (
   input: Array<{ [key: string]: string }>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1tagSet(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1tagSet(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1tagSet = (
@@ -1504,25 +1552,33 @@ const serializeAws_json1_1EventArnsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OrganizationEntityFiltersList = (
   input: Array<EventAccountFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EventAccountFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EventAccountFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OrganizationEventDetailFiltersList = (
   input: Array<EventAccountFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EventAccountFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EventAccountFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DateTimeRange = (
@@ -1683,14 +1739,22 @@ const serializeAws_json1_1EventTypeCategoryList = (
   input: Array<EventTypeCategory | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EventTypeCodeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EventTypeFilter = (
@@ -1801,9 +1865,11 @@ const serializeAws_json1_1dateTimeRangeList = (
   input: Array<DateTimeRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DateTimeRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DateTimeRange(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1eventMetadata = (
diff --git a/clients/client-iam/protocols/Aws_query.ts b/clients/client-iam/protocols/Aws_query.ts
index cc30891b972c6..7db68118538f2 100644
--- a/clients/client-iam/protocols/Aws_query.ts
+++ b/clients/client-iam/protocols/Aws_query.ts
@@ -14923,10 +14923,10 @@ const serializeAws_queryActionNameListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -15058,13 +15058,13 @@ const serializeAws_queryContextEntryListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryContextEntry(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -15074,10 +15074,10 @@ const serializeAws_queryContextKeyValueListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -16646,10 +16646,10 @@ const serializeAws_queryResourceNameListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -16839,10 +16839,10 @@ const serializeAws_querySimulationPolicyListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -17243,10 +17243,10 @@ const serializeAws_queryclientIDListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -17256,10 +17256,10 @@ const serializeAws_queryentityListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -17269,10 +17269,10 @@ const serializeAws_queryserviceNamespaceListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -17282,10 +17282,10 @@ const serializeAws_querytagKeyListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -17295,13 +17295,13 @@ const serializeAws_querytagListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -17311,10 +17311,10 @@ const serializeAws_querythumbprintListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -17936,8 +17936,8 @@ const deserializeAws_queryEvalDecisionDetailsType = (
   context: __SerdeContext
 ): { [key: string]: PolicyEvaluationDecisionType | string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
@@ -21801,8 +21801,8 @@ const deserializeAws_querysummaryMapType = (
   context: __SerdeContext
 ): { [key: string]: number } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = parseInt(output[key]);
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = parseInt(pair["value"]);
   });
   return mapParams;
 };
diff --git a/clients/client-imagebuilder/protocols/Aws_restJson1_1.ts b/clients/client-imagebuilder/protocols/Aws_restJson1_1.ts
index e00124b090e01..64a980cac3dcb 100644
--- a/clients/client-imagebuilder/protocols/Aws_restJson1_1.ts
+++ b/clients/client-imagebuilder/protocols/Aws_restJson1_1.ts
@@ -7293,7 +7293,11 @@ const serializeAws_restJson1_1AccountList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AmiDistributionConfiguration = (
@@ -7328,7 +7332,11 @@ const serializeAws_restJson1_1ArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ComponentConfiguration = (
@@ -7346,9 +7354,13 @@ const serializeAws_restJson1_1ComponentConfigurationList = (
   input: Array<ComponentConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ComponentConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1ComponentConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Distribution = (
@@ -7380,9 +7392,11 @@ const serializeAws_restJson1_1DistributionList = (
   input: Array<Distribution>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Distribution(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Distribution(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1EbsInstanceBlockDeviceSpecification = (
@@ -7435,16 +7449,22 @@ const serializeAws_restJson1_1FilterList = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Filter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ImageTestsConfiguration = (
@@ -7490,16 +7510,24 @@ const serializeAws_restJson1_1InstanceBlockDeviceMappings = (
   input: Array<InstanceBlockDeviceMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InstanceBlockDeviceMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1InstanceBlockDeviceMapping(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1InstanceTypeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LaunchPermissionConfiguration = (
@@ -7569,14 +7597,22 @@ const serializeAws_restJson1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
diff --git a/clients/client-inspector/protocols/Aws_json1_1.ts b/clients/client-inspector/protocols/Aws_json1_1.ts
index 089e674ac4540..beb35a583e370 100644
--- a/clients/client-inspector/protocols/Aws_json1_1.ts
+++ b/clients/client-inspector/protocols/Aws_json1_1.ts
@@ -4517,7 +4517,11 @@ const serializeAws_json1_1AddRemoveAttributesFindingArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AgentFilter = (
@@ -4544,21 +4548,33 @@ const serializeAws_json1_1AgentHealthCodeList = (
   input: Array<AgentHealthCode | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AgentHealthList = (
   input: Array<AgentHealth | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AgentIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssessmentRunFilter = (
@@ -4614,7 +4630,11 @@ const serializeAws_json1_1AssessmentRunStateList = (
   input: Array<AssessmentRunState | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssessmentTargetFilter = (
@@ -4658,7 +4678,11 @@ const serializeAws_json1_1AssessmentTemplateRulesPackageArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Attribute = (
@@ -4679,30 +4703,44 @@ const serializeAws_json1_1AttributeList = (
   input: Array<Attribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Attribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Attribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutoScalingGroupList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchDescribeArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchDescribeExclusionsArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateAssessmentTargetRequest = (
@@ -4941,7 +4979,11 @@ const serializeAws_json1_1FilterRulesPackageArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FindingFilter = (
@@ -5214,7 +5256,11 @@ const serializeAws_json1_1ListParentArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListRulesPackagesRequest = (
@@ -5310,16 +5356,22 @@ const serializeAws_json1_1ResourceGroupTags = (
   input: Array<ResourceGroupTag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResourceGroupTag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ResourceGroupTag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RuleNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SetTagsForResourceRequest = (
@@ -5340,7 +5392,11 @@ const serializeAws_json1_1SeverityList = (
   input: Array<Severity | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartAssessmentRunRequest = (
@@ -5403,7 +5459,11 @@ const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TimestampRange = (
@@ -5458,16 +5518,22 @@ const serializeAws_json1_1UserAttributeKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UserAttributeList = (
   input: Array<Attribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Attribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Attribute(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AccessDeniedException = (
diff --git a/clients/client-iot-events-data/protocols/Aws_restJson1_1.ts b/clients/client-iot-events-data/protocols/Aws_restJson1_1.ts
index fa08bff4a75eb..fdf137e686a9b 100644
--- a/clients/client-iot-events-data/protocols/Aws_restJson1_1.ts
+++ b/clients/client-iot-events-data/protocols/Aws_restJson1_1.ts
@@ -705,9 +705,11 @@ const serializeAws_restJson1_1Messages = (
   input: Array<Message>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Message(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Message(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TimerDefinition = (
@@ -728,9 +730,11 @@ const serializeAws_restJson1_1TimerDefinitions = (
   input: Array<TimerDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TimerDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1TimerDefinition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1UpdateDetectorRequest = (
@@ -760,9 +764,13 @@ const serializeAws_restJson1_1UpdateDetectorRequests = (
   input: Array<UpdateDetectorRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1UpdateDetectorRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1UpdateDetectorRequest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1VariableDefinition = (
@@ -783,9 +791,11 @@ const serializeAws_restJson1_1VariableDefinitions = (
   input: Array<VariableDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1VariableDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1VariableDefinition(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1BatchPutMessageErrorEntries = (
diff --git a/clients/client-iot-events/protocols/Aws_restJson1_1.ts b/clients/client-iot-events/protocols/Aws_restJson1_1.ts
index 159c7f4bef1af..973860038865f 100644
--- a/clients/client-iot-events/protocols/Aws_restJson1_1.ts
+++ b/clients/client-iot-events/protocols/Aws_restJson1_1.ts
@@ -2522,9 +2522,11 @@ const serializeAws_restJson1_1Actions = (
   input: Array<Action>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Action(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Action(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Attribute = (
@@ -2542,9 +2544,11 @@ const serializeAws_restJson1_1Attributes = (
   input: Array<Attribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Attribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Attribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ClearTimerAction = (
@@ -2576,9 +2580,11 @@ const serializeAws_restJson1_1DetectorDebugOptions = (
   input: Array<DetectorDebugOption>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DetectorDebugOption(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DetectorDebugOption(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DetectorModelDefinition = (
@@ -2622,9 +2628,11 @@ const serializeAws_restJson1_1Events = (
   input: Array<Event>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Event(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Event(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FirehoseAction = (
@@ -2858,9 +2866,11 @@ const serializeAws_restJson1_1States = (
   input: Array<State>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1State(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1State(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tag = (
@@ -2881,9 +2891,11 @@ const serializeAws_restJson1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TransitionEvent = (
@@ -2913,9 +2925,11 @@ const serializeAws_restJson1_1TransitionEvents = (
   input: Array<TransitionEvent>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TransitionEvent(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1TransitionEvent(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1Action = (
diff --git a/clients/client-iot/protocols/Aws_restJson1_1.ts b/clients/client-iot/protocols/Aws_restJson1_1.ts
index a5e924612cd16..6ee0f84f45f65 100644
--- a/clients/client-iot/protocols/Aws_restJson1_1.ts
+++ b/clients/client-iot/protocols/Aws_restJson1_1.ts
@@ -29820,7 +29820,11 @@ const serializeAws_restJson1_1PolicyNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tag = (
@@ -29841,16 +29845,22 @@ const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Action = (
@@ -29968,9 +29978,11 @@ const serializeAws_restJson1_1ActionList = (
   input: Array<Action>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Action(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Action(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AssetPropertyTimestamp = (
@@ -30014,9 +30026,11 @@ const serializeAws_restJson1_1AssetPropertyValueList = (
   input: Array<AssetPropertyValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AssetPropertyValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AssetPropertyValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AssetPropertyVariant = (
@@ -30184,9 +30198,11 @@ const serializeAws_restJson1_1HeaderList = (
   input: Array<HttpActionHeader>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1HttpActionHeader(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1HttpActionHeader(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1HttpAction = (
@@ -30395,9 +30411,13 @@ const serializeAws_restJson1_1PutAssetPropertyValueEntryList = (
   input: Array<PutAssetPropertyValueEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1PutAssetPropertyValueEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1PutAssetPropertyValueEntry(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PutItemInput = (
@@ -30599,9 +30619,11 @@ const serializeAws_restJson1_1AuthInfos = (
   input: Array<AuthInfo>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AuthInfo(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AuthInfo(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AuthorizerConfig = (
@@ -30703,14 +30725,22 @@ const serializeAws_restJson1_1Resources = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ServerCertificateArns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TlsContext = (
@@ -30742,16 +30772,22 @@ const serializeAws_restJson1_1Fields = (
   input: Array<Field>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Field(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Field(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PercentList = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ThingGroupIndexingConfiguration = (
@@ -30842,9 +30878,11 @@ const serializeAws_restJson1_1AbortCriteriaList = (
   input: Array<AbortCriteria>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AbortCriteria(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AbortCriteria(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ExponentialRolloutRate = (
@@ -30892,7 +30930,11 @@ const serializeAws_restJson1_1JobTargets = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PresignedUrlConfig = (
@@ -31137,16 +31179,22 @@ const serializeAws_restJson1_1OTAUpdateFiles = (
   input: Array<OTAUpdateFile>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1OTAUpdateFile(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1OTAUpdateFile(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Protocols = (
   input: Array<Protocol | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1S3Destination = (
@@ -31223,7 +31271,11 @@ const serializeAws_restJson1_1Targets = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AttributePayload = (
@@ -31269,14 +31321,22 @@ const serializeAws_restJson1_1SearchableAttributes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ThingGroupList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ThingGroupProperties = (
@@ -31428,7 +31488,11 @@ const serializeAws_restJson1_1ThingGroupNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1UpdateCACertificateParams = (
@@ -31566,14 +31630,22 @@ const serializeAws_restJson1_1FindingIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1MitigationActionNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PolicyVersionIdentifier = (
@@ -31594,7 +31666,11 @@ const serializeAws_restJson1_1ReasonForNonComplianceCodes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourceIdentifier = (
@@ -31638,14 +31714,22 @@ const serializeAws_restJson1_1TargetAuditCheckNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AdditionalMetricsToRetainList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AlertTarget = (
@@ -31733,16 +31817,22 @@ const serializeAws_restJson1_1Behaviors = (
   input: Array<Behavior>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Behavior(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Behavior(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Cidrs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1MetricValue = (
@@ -31766,7 +31856,11 @@ const serializeAws_restJson1_1Ports = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StatisticalThreshold = (
@@ -31801,9 +31895,11 @@ const serializeAws_restJson1_1StreamFiles = (
   input: Array<StreamFile>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1StreamFile(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1StreamFile(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1S3Location = (
diff --git a/clients/client-iotanalytics/protocols/Aws_restJson1_1.ts b/clients/client-iotanalytics/protocols/Aws_restJson1_1.ts
index daa2e0c4126c3..fa817373300da 100644
--- a/clients/client-iotanalytics/protocols/Aws_restJson1_1.ts
+++ b/clients/client-iotanalytics/protocols/Aws_restJson1_1.ts
@@ -4979,7 +4979,11 @@ const serializeAws_restJson1_1AttributeNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ChannelActivity = (
@@ -5114,9 +5118,11 @@ const serializeAws_restJson1_1DatasetActions = (
   input: Array<DatasetAction>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DatasetAction(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DatasetAction(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DatasetContentDeliveryDestination = (
@@ -5166,9 +5172,13 @@ const serializeAws_restJson1_1DatasetContentDeliveryRules = (
   input: Array<DatasetContentDeliveryRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DatasetContentDeliveryRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1DatasetContentDeliveryRule(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DatasetContentVersionValue = (
@@ -5206,9 +5216,11 @@ const serializeAws_restJson1_1DatasetTriggers = (
   input: Array<DatasetTrigger>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DatasetTrigger(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DatasetTrigger(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DatastoreActivity = (
@@ -5415,7 +5427,11 @@ const serializeAws_restJson1_1MessagePayloads = (
   input: Array<Uint8Array>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => context.base64Encoder(entry));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(context.base64Encoder(entry));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1OutputFileUriValue = (
@@ -5433,9 +5449,11 @@ const serializeAws_restJson1_1PipelineActivities = (
   input: Array<PipelineActivity>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1PipelineActivity(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1PipelineActivity(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PipelineActivity = (
@@ -5532,9 +5550,11 @@ const serializeAws_restJson1_1QueryFilters = (
   input: Array<QueryFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1QueryFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1QueryFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1RemoveAttributesActivity = (
@@ -5690,9 +5710,11 @@ const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TriggeringDataset = (
@@ -5743,9 +5765,11 @@ const serializeAws_restJson1_1Variables = (
   input: Array<Variable>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Variable(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Variable(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1VersioningConfiguration = (
@@ -5780,9 +5804,11 @@ const serializeAws_restJson1_1Messages = (
   input: Array<Message>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Message(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Message(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1AddAttributesActivity = (
diff --git a/clients/client-iotsecuretunneling/protocols/Aws_json1_1.ts b/clients/client-iotsecuretunneling/protocols/Aws_json1_1.ts
index bc833fba0f3f6..0cfe16e22936b 100644
--- a/clients/client-iotsecuretunneling/protocols/Aws_json1_1.ts
+++ b/clients/client-iotsecuretunneling/protocols/Aws_json1_1.ts
@@ -695,7 +695,11 @@ const serializeAws_json1_1ServiceList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -713,14 +717,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-iotthingsgraph/protocols/Aws_json1_1.ts b/clients/client-iotthingsgraph/protocols/Aws_json1_1.ts
index e3350dbf2047c..e9e01a8750ec1 100644
--- a/clients/client-iotthingsgraph/protocols/Aws_json1_1.ts
+++ b/clients/client-iotthingsgraph/protocols/Aws_json1_1.ts
@@ -4633,14 +4633,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DefinitionDocument = (
@@ -4661,7 +4669,11 @@ const serializeAws_json1_1Urns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EntityFilter = (
@@ -4685,23 +4697,33 @@ const serializeAws_json1_1EntityFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EntityFilters = (
   input: Array<EntityFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EntityFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EntityFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EntityTypes = (
   input: Array<EntityType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FlowTemplateFilter = (
@@ -4725,16 +4747,22 @@ const serializeAws_json1_1FlowTemplateFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FlowTemplateFilters = (
   input: Array<FlowTemplateFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1FlowTemplateFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1FlowTemplateFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MetricsConfiguration = (
@@ -4772,16 +4800,22 @@ const serializeAws_json1_1SystemInstanceFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SystemInstanceFilters = (
   input: Array<SystemInstanceFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SystemInstanceFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SystemInstanceFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SystemTemplateFilter = (
@@ -4805,16 +4839,22 @@ const serializeAws_json1_1SystemTemplateFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SystemTemplateFilters = (
   input: Array<SystemTemplateFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SystemTemplateFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SystemTemplateFilter(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AssociateEntityToThingResponse = (
diff --git a/clients/client-kafka/protocols/Aws_restJson1_1.ts b/clients/client-kafka/protocols/Aws_restJson1_1.ts
index eab0e5fdfd2e6..8e16f72e93735 100644
--- a/clients/client-kafka/protocols/Aws_restJson1_1.ts
+++ b/clients/client-kafka/protocols/Aws_restJson1_1.ts
@@ -3335,16 +3335,22 @@ const serializeAws_restJson1_1__listOfBrokerEBSVolumeInfo = (
   input: Array<BrokerEBSVolumeInfo>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1BrokerEBSVolumeInfo(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1BrokerEBSVolumeInfo(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__mapOf__string = (
diff --git a/clients/client-kendra/protocols/Aws_json1_1.ts b/clients/client-kendra/protocols/Aws_json1_1.ts
index 1ded422717ba5..adfc72c356370 100644
--- a/clients/client-kendra/protocols/Aws_json1_1.ts
+++ b/clients/client-kendra/protocols/Aws_json1_1.ts
@@ -2861,9 +2861,11 @@ const serializeAws_json1_1AttributeFilterList = (
   input: Array<AttributeFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AttributeFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AttributeFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchDeleteDocumentRequest = (
@@ -2907,7 +2909,11 @@ const serializeAws_json1_1ChangeDetectingColumns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ClickFeedback = (
@@ -2928,9 +2934,11 @@ const serializeAws_json1_1ClickFeedbackList = (
   input: Array<ClickFeedback>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ClickFeedback(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ClickFeedback(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ColumnConfiguration = (
@@ -3105,7 +3113,11 @@ const serializeAws_json1_1DataSourceInclusionsExclusionsStrings = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DataSourceToIndexFieldMapping = (
@@ -3129,9 +3141,13 @@ const serializeAws_json1_1DataSourceToIndexFieldMappingList = (
   input: Array<DataSourceToIndexFieldMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DataSourceToIndexFieldMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1DataSourceToIndexFieldMapping(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DataSourceVpcConfiguration = (
@@ -3313,23 +3329,33 @@ const serializeAws_json1_1DocumentAttributeKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentAttributeList = (
   input: Array<DocumentAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DocumentAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DocumentAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentAttributeStringListValue = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentAttributeValue = (
@@ -3361,16 +3387,22 @@ const serializeAws_json1_1DocumentIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentList = (
   input: Array<Document>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Document(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Document(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentMetadataConfiguration = (
@@ -3400,9 +3432,13 @@ const serializeAws_json1_1DocumentMetadataConfigurationList = (
   input: Array<DocumentMetadataConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DocumentMetadataConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1DocumentMetadataConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentsMetadataConfiguration = (
@@ -3431,7 +3467,11 @@ const serializeAws_json1_1FacetList = (
   input: Array<Facet>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Facet(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Facet(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListDataSourceSyncJobsRequest = (
@@ -3532,9 +3572,11 @@ const serializeAws_json1_1PrincipalList = (
   input: Array<Principal>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Principal(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Principal(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1QueryRequest = (
@@ -3621,9 +3663,11 @@ const serializeAws_json1_1RelevanceFeedbackList = (
   input: Array<RelevanceFeedback>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RelevanceFeedback(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RelevanceFeedback(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1S3DataSourceConfiguration = (
@@ -3704,7 +3748,11 @@ const serializeAws_json1_1SecurityGroupIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServerSideEncryptionConfiguration = (
@@ -3764,7 +3812,11 @@ const serializeAws_json1_1SharePointUrlList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartDataSourceSyncJobRequest = (
@@ -3827,7 +3879,11 @@ const serializeAws_json1_1SubnetIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TimeRange = (
diff --git a/clients/client-kinesis-analytics-v2/protocols/Aws_json1_1.ts b/clients/client-kinesis-analytics-v2/protocols/Aws_json1_1.ts
index 74b2356be60fd..6cfec98a9b8d0 100644
--- a/clients/client-kinesis-analytics-v2/protocols/Aws_json1_1.ts
+++ b/clients/client-kinesis-analytics-v2/protocols/Aws_json1_1.ts
@@ -3898,18 +3898,24 @@ const serializeAws_json1_1CloudWatchLoggingOptionUpdates = (
   input: Array<CloudWatchLoggingOptionUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CloudWatchLoggingOptionUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1CloudWatchLoggingOptionUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CloudWatchLoggingOptions = (
   input: Array<CloudWatchLoggingOption>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CloudWatchLoggingOption(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CloudWatchLoggingOption(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CodeContent = (
@@ -4523,16 +4529,22 @@ const serializeAws_json1_1InputUpdates = (
   input: Array<InputUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InputUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InputUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Inputs = (
   input: Array<Input>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Input(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Input(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1JSONMappingParameters = (
@@ -4843,16 +4855,22 @@ const serializeAws_json1_1OutputUpdates = (
   input: Array<OutputUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OutputUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OutputUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Outputs = (
   input: Array<Output>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Output(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Output(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParallelismConfiguration = (
@@ -4916,9 +4934,11 @@ const serializeAws_json1_1PropertyGroups = (
   input: Array<PropertyGroup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PropertyGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PropertyGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PropertyMap = (
@@ -4953,9 +4973,11 @@ const serializeAws_json1_1RecordColumns = (
   input: Array<RecordColumn>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RecordColumn(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RecordColumn(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RecordFormat = (
@@ -5032,18 +5054,24 @@ const serializeAws_json1_1ReferenceDataSourceUpdates = (
   input: Array<ReferenceDataSourceUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ReferenceDataSourceUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ReferenceDataSourceUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ReferenceDataSources = (
   input: Array<ReferenceDataSource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ReferenceDataSource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ReferenceDataSource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RunConfiguration = (
@@ -5182,7 +5210,11 @@ const serializeAws_json1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SourceSchema = (
@@ -5281,9 +5313,11 @@ const serializeAws_json1_1SqlRunConfigurations = (
   input: Array<SqlRunConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SqlRunConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SqlRunConfiguration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartApplicationRequest = (
@@ -5318,7 +5352,11 @@ const serializeAws_json1_1SubnetIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -5336,7 +5374,11 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -5357,7 +5399,11 @@ const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceRequest = (
@@ -5463,18 +5509,22 @@ const serializeAws_json1_1VpcConfigurationUpdates = (
   input: Array<VpcConfigurationUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1VpcConfigurationUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1VpcConfigurationUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1VpcConfigurations = (
   input: Array<VpcConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1VpcConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1VpcConfiguration(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AddApplicationCloudWatchLoggingOptionResponse = (
diff --git a/clients/client-kinesis-analytics/protocols/Aws_json1_1.ts b/clients/client-kinesis-analytics/protocols/Aws_json1_1.ts
index b47c5dd64192d..0af7b368e0530 100644
--- a/clients/client-kinesis-analytics/protocols/Aws_json1_1.ts
+++ b/clients/client-kinesis-analytics/protocols/Aws_json1_1.ts
@@ -2834,18 +2834,24 @@ const serializeAws_json1_1CloudWatchLoggingOptionUpdates = (
   input: Array<CloudWatchLoggingOptionUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CloudWatchLoggingOptionUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1CloudWatchLoggingOptionUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CloudWatchLoggingOptions = (
   input: Array<CloudWatchLoggingOption>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CloudWatchLoggingOption(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CloudWatchLoggingOption(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateApplicationRequest = (
@@ -3096,9 +3102,11 @@ const serializeAws_json1_1InputConfigurations = (
   input: Array<InputConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InputConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InputConfiguration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InputLambdaProcessor = (
@@ -3273,16 +3281,22 @@ const serializeAws_json1_1InputUpdates = (
   input: Array<InputUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InputUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InputUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Inputs = (
   input: Array<Input>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Input(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Input(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1JSONMappingParameters = (
@@ -3573,16 +3587,22 @@ const serializeAws_json1_1OutputUpdates = (
   input: Array<OutputUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OutputUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OutputUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Outputs = (
   input: Array<Output>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Output(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Output(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RecordColumn = (
@@ -3606,9 +3626,11 @@ const serializeAws_json1_1RecordColumns = (
   input: Array<RecordColumn>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RecordColumn(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RecordColumn(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RecordFormat = (
@@ -3685,9 +3707,13 @@ const serializeAws_json1_1ReferenceDataSourceUpdates = (
   input: Array<ReferenceDataSourceUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ReferenceDataSourceUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ReferenceDataSourceUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1S3Configuration = (
@@ -3807,7 +3833,11 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -3828,7 +3858,11 @@ const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceRequest = (
diff --git a/clients/client-kinesis-video-archived-media/protocols/Aws_restJson1_1.ts b/clients/client-kinesis-video-archived-media/protocols/Aws_restJson1_1.ts
index 3be54d9dc5c49..a3ff5f21a87a7 100644
--- a/clients/client-kinesis-video-archived-media/protocols/Aws_restJson1_1.ts
+++ b/clients/client-kinesis-video-archived-media/protocols/Aws_restJson1_1.ts
@@ -832,7 +832,11 @@ const serializeAws_restJson1_1FragmentNumberList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FragmentSelector = (
diff --git a/clients/client-kinesis-video/protocols/Aws_restJson1_1.ts b/clients/client-kinesis-video/protocols/Aws_restJson1_1.ts
index 2eb09af681262..c9b4227a5816f 100644
--- a/clients/client-kinesis-video/protocols/Aws_restJson1_1.ts
+++ b/clients/client-kinesis-video/protocols/Aws_restJson1_1.ts
@@ -2765,7 +2765,11 @@ const serializeAws_restJson1_1ListOfProtocols = (
   input: Array<ChannelProtocol | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourceTags = (
@@ -2839,25 +2843,33 @@ const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagOnCreateList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ChannelInfo = (
diff --git a/clients/client-kinesis/protocols/Aws_json1_1.ts b/clients/client-kinesis/protocols/Aws_json1_1.ts
index aeebd03ad2a2e..6816ab8194972 100644
--- a/clients/client-kinesis/protocols/Aws_json1_1.ts
+++ b/clients/client-kinesis/protocols/Aws_json1_1.ts
@@ -3681,7 +3681,11 @@ const serializeAws_json1_1MetricsNameList = (
   input: Array<MetricsName | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutRecordInput = (
@@ -3745,9 +3749,11 @@ const serializeAws_json1_1PutRecordsRequestEntryList = (
   input: Array<PutRecordsRequestEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PutRecordsRequestEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PutRecordsRequestEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegisterStreamConsumerInput = (
@@ -3873,7 +3879,11 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagMap = (
diff --git a/clients/client-kms/protocols/Aws_json1_1.ts b/clients/client-kms/protocols/Aws_json1_1.ts
index 557cf90222a85..ac998a71f1821 100644
--- a/clients/client-kms/protocols/Aws_json1_1.ts
+++ b/clients/client-kms/protocols/Aws_json1_1.ts
@@ -7207,14 +7207,22 @@ const serializeAws_json1_1GrantOperationList = (
   input: Array<GrantOperation | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GrantTokenList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ImportKeyMaterialRequest = (
@@ -7494,14 +7502,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-lakeformation/protocols/Aws_json1_1.ts b/clients/client-lakeformation/protocols/Aws_json1_1.ts
index c32f57c80874c..c7532696fc2b6 100644
--- a/clients/client-lakeformation/protocols/Aws_json1_1.ts
+++ b/clients/client-lakeformation/protocols/Aws_json1_1.ts
@@ -1535,9 +1535,13 @@ const serializeAws_json1_1BatchPermissionsRequestEntryList = (
   input: Array<BatchPermissionsRequestEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1BatchPermissionsRequestEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1BatchPermissionsRequestEntry(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1BatchRevokePermissionsRequest = (
@@ -1571,7 +1575,11 @@ const serializeAws_json1_1ColumnNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ColumnWildcard = (
@@ -1604,9 +1612,11 @@ const serializeAws_json1_1DataLakePrincipalList = (
   input: Array<DataLakePrincipal>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DataLakePrincipal(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DataLakePrincipal(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DataLakeSettings = (
@@ -1807,7 +1817,11 @@ const serializeAws_json1_1PermissionList = (
   input: Array<Permission | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PrincipalPermissions = (
@@ -1834,9 +1848,11 @@ const serializeAws_json1_1PrincipalPermissionsList = (
   input: Array<PrincipalPermissions>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PrincipalPermissions(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PrincipalPermissions(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutDataLakeSettingsRequest = (
@@ -2028,16 +2044,22 @@ const serializeAws_json1_1FilterConditionList = (
   input: Array<FilterCondition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1FilterCondition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1FilterCondition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StringValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1BatchGrantPermissionsResponse = (
diff --git a/clients/client-lambda/protocols/Aws_restJson1_1.ts b/clients/client-lambda/protocols/Aws_restJson1_1.ts
index 5288e624e9671..d630351406ee1 100644
--- a/clients/client-lambda/protocols/Aws_restJson1_1.ts
+++ b/clients/client-lambda/protocols/Aws_restJson1_1.ts
@@ -9063,7 +9063,11 @@ const serializeAws_restJson1_1CompatibleRuntimes = (
   input: Array<Runtime | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DeadLetterConfig = (
@@ -9146,7 +9150,11 @@ const serializeAws_restJson1_1LayerList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LayerVersionContentInput = (
@@ -9195,14 +9203,22 @@ const serializeAws_restJson1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SubnetIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tags = (
diff --git a/clients/client-lex-model-building-service/protocols/Aws_restJson1_1.ts b/clients/client-lex-model-building-service/protocols/Aws_restJson1_1.ts
index 85530439cab39..b25db31eadec8 100644
--- a/clients/client-lex-model-building-service/protocols/Aws_restJson1_1.ts
+++ b/clients/client-lex-model-building-service/protocols/Aws_restJson1_1.ts
@@ -6001,9 +6001,11 @@ const serializeAws_restJson1_1EnumerationValues = (
   input: Array<EnumerationValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1EnumerationValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1EnumerationValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FollowUpPrompt = (
@@ -6061,16 +6063,22 @@ const serializeAws_restJson1_1IntentList = (
   input: Array<Intent>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Intent(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Intent(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1IntentUtteranceList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LogSettingsRequest = (
@@ -6097,9 +6105,11 @@ const serializeAws_restJson1_1LogSettingsRequestList = (
   input: Array<LogSettingsRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1LogSettingsRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1LogSettingsRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Message = (
@@ -6123,9 +6133,11 @@ const serializeAws_restJson1_1MessageList = (
   input: Array<Message>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Message(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Message(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Prompt = (
@@ -6196,16 +6208,22 @@ const serializeAws_restJson1_1SlotList = (
   input: Array<Slot>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Slot(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Slot(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SlotUtteranceList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Statement = (
@@ -6229,7 +6247,11 @@ const serializeAws_restJson1_1SynonymList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1BotAliasMetadata = (
diff --git a/clients/client-lex-runtime-service/protocols/Aws_restJson1_1.ts b/clients/client-lex-runtime-service/protocols/Aws_restJson1_1.ts
index e3ebcd7010e31..9d909aa3ad23b 100644
--- a/clients/client-lex-runtime-service/protocols/Aws_restJson1_1.ts
+++ b/clients/client-lex-runtime-service/protocols/Aws_restJson1_1.ts
@@ -1396,9 +1396,11 @@ const serializeAws_restJson1_1IntentSummaryList = (
   input: Array<IntentSummary>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1IntentSummary(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1IntentSummary(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StringMap = (
diff --git a/clients/client-license-manager/protocols/Aws_json1_1.ts b/clients/client-license-manager/protocols/Aws_json1_1.ts
index 60f4aedd17987..43b346e03a211 100644
--- a/clients/client-license-manager/protocols/Aws_json1_1.ts
+++ b/clients/client-license-manager/protocols/Aws_json1_1.ts
@@ -2352,14 +2352,22 @@ const serializeAws_json1_1FilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filters = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetLicenseConfigurationRequest = (
@@ -2402,9 +2410,11 @@ const serializeAws_json1_1InventoryFilterList = (
   input: Array<InventoryFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InventoryFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InventoryFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LicenseSpecification = (
@@ -2422,9 +2432,11 @@ const serializeAws_json1_1LicenseSpecifications = (
   input: Array<LicenseSpecification>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1LicenseSpecification(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1LicenseSpecification(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListAssociationsForLicenseConfigurationRequest = (
@@ -2610,25 +2622,33 @@ const serializeAws_json1_1ProductInformationFilterList = (
   input: Array<ProductInformationFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProductInformationFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProductInformationFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProductInformationList = (
   input: Array<ProductInformation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProductInformation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProductInformation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -2646,14 +2666,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-lightsail/protocols/Aws_json1_1.ts b/clients/client-lightsail/protocols/Aws_json1_1.ts
index 8ca5b05e39c7c..6b26ca3227741 100644
--- a/clients/client-lightsail/protocols/Aws_json1_1.ts
+++ b/clients/client-lightsail/protocols/Aws_json1_1.ts
@@ -15027,9 +15027,11 @@ const serializeAws_json1_1AddOnRequestList = (
   input: Array<AddOnRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AddOnRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AddOnRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AllocateStaticIpRequest = (
@@ -15829,9 +15831,11 @@ const serializeAws_json1_1DiskMapList = (
   input: Array<DiskMap>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DiskMap(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DiskMap(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DomainEntry = (
@@ -15878,7 +15882,11 @@ const serializeAws_json1_1DomainNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DownloadDefaultKeyPairRequest = (
@@ -16549,9 +16557,11 @@ const serializeAws_json1_1InstanceEntryList = (
   input: Array<InstanceEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InstanceEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InstanceEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IsVpcPeeredRequest = (
@@ -16566,7 +16576,11 @@ const serializeAws_json1_1MetricStatisticList = (
   input: Array<MetricStatistic | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpenInstancePublicPortsRequest = (
@@ -16615,9 +16629,11 @@ const serializeAws_json1_1PortInfoList = (
   input: Array<PortInfo>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PortInfo(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PortInfo(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutInstancePublicPortsRequest = (
@@ -16695,9 +16711,13 @@ const serializeAws_json1_1RelationalDatabaseParameterList = (
   input: Array<RelationalDatabaseParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RelationalDatabaseParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1RelationalDatabaseParameter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ReleaseStaticIpRequest = (
@@ -16715,7 +16735,11 @@ const serializeAws_json1_1ResourceNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartInstanceRequest = (
@@ -16773,7 +16797,11 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -16791,14 +16819,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-machine-learning/protocols/Aws_json1_1.ts b/clients/client-machine-learning/protocols/Aws_json1_1.ts
index 1d9a72fd212ea..a32c1496132df 100644
--- a/clients/client-machine-learning/protocols/Aws_json1_1.ts
+++ b/clients/client-machine-learning/protocols/Aws_json1_1.ts
@@ -3422,7 +3422,11 @@ const serializeAws_json1_1EDPSecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetBatchPredictionInput = (
@@ -3683,14 +3687,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TrainingParameters = (
diff --git a/clients/client-macie/protocols/Aws_json1_1.ts b/clients/client-macie/protocols/Aws_json1_1.ts
index a1a3d0d58325a..5ebc5e3f97d3d 100644
--- a/clients/client-macie/protocols/Aws_json1_1.ts
+++ b/clients/client-macie/protocols/Aws_json1_1.ts
@@ -959,27 +959,35 @@ const serializeAws_json1_1S3Resources = (
   input: Array<S3Resource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1S3Resource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1S3Resource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1S3ResourcesClassification = (
   input: Array<S3ResourceClassification>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1S3ResourceClassification(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1S3ResourceClassification(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1S3ResourcesClassificationUpdate = (
   input: Array<S3ResourceClassificationUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1S3ResourceClassificationUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1S3ResourceClassificationUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateS3ResourcesRequest = (
diff --git a/clients/client-managedblockchain/protocols/Aws_restJson1_1.ts b/clients/client-managedblockchain/protocols/Aws_restJson1_1.ts
index 187b8643d96b0..e0010c9c6f21f 100644
--- a/clients/client-managedblockchain/protocols/Aws_restJson1_1.ts
+++ b/clients/client-managedblockchain/protocols/Aws_restJson1_1.ts
@@ -2947,9 +2947,11 @@ const serializeAws_restJson1_1InviteActionList = (
   input: Array<InviteAction>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InviteAction(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InviteAction(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1MemberConfiguration = (
@@ -3076,9 +3078,11 @@ const serializeAws_restJson1_1RemoveActionList = (
   input: Array<RemoveAction>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1RemoveAction(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1RemoveAction(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1VotingPolicy = (
diff --git a/clients/client-marketplace-catalog/protocols/Aws_restJson1_1.ts b/clients/client-marketplace-catalog/protocols/Aws_restJson1_1.ts
index 64d68e90bbdf4..bcb928a311312 100644
--- a/clients/client-marketplace-catalog/protocols/Aws_restJson1_1.ts
+++ b/clients/client-marketplace-catalog/protocols/Aws_restJson1_1.ts
@@ -1128,18 +1128,22 @@ const serializeAws_restJson1_1FilterList = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Filter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1RequestedChangeList = (
   input: Array<Change>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Change(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Change(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Sort = (
@@ -1160,7 +1164,11 @@ const serializeAws_restJson1_1ValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ChangeSetDescription = (
diff --git a/clients/client-marketplace-entitlement-service/protocols/Aws_json1_1.ts b/clients/client-marketplace-entitlement-service/protocols/Aws_json1_1.ts
index 5b3f4627f2fea..68592df660f4f 100644
--- a/clients/client-marketplace-entitlement-service/protocols/Aws_json1_1.ts
+++ b/clients/client-marketplace-entitlement-service/protocols/Aws_json1_1.ts
@@ -175,7 +175,11 @@ const serializeAws_json1_1FilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetEntitlementFilters = (
diff --git a/clients/client-marketplace-metering/protocols/Aws_json1_1.ts b/clients/client-marketplace-metering/protocols/Aws_json1_1.ts
index c99850e0ecf9b..634bb6ef7ef6c 100644
--- a/clients/client-marketplace-metering/protocols/Aws_json1_1.ts
+++ b/clients/client-marketplace-metering/protocols/Aws_json1_1.ts
@@ -946,9 +946,11 @@ const serializeAws_json1_1UsageRecordList = (
   input: Array<UsageRecord>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1UsageRecord(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1UsageRecord(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1BatchMeterUsageResult = (
diff --git a/clients/client-mediaconnect/protocols/Aws_restJson1_1.ts b/clients/client-mediaconnect/protocols/Aws_restJson1_1.ts
index 6c4d266d8d064..fb7261d3a445a 100644
--- a/clients/client-mediaconnect/protocols/Aws_restJson1_1.ts
+++ b/clients/client-mediaconnect/protocols/Aws_restJson1_1.ts
@@ -2920,25 +2920,35 @@ const serializeAws_restJson1_1__listOfAddOutputRequest = (
   input: Array<AddOutputRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AddOutputRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AddOutputRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfGrantEntitlementRequest = (
   input: Array<GrantEntitlementRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1GrantEntitlementRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1GrantEntitlementRequest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__mapOf__string = (
diff --git a/clients/client-mediaconvert/protocols/Aws_restJson1_1.ts b/clients/client-mediaconvert/protocols/Aws_restJson1_1.ts
index a34ab077883c5..2d23c3a2aaf7e 100644
--- a/clients/client-mediaconvert/protocols/Aws_restJson1_1.ts
+++ b/clients/client-mediaconvert/protocols/Aws_restJson1_1.ts
@@ -7700,214 +7700,298 @@ const serializeAws_restJson1_1__listOfAudioDescription = (
   input: Array<AudioDescription>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AudioDescription(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AudioDescription(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfCaptionDescription = (
   input: Array<CaptionDescription>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CaptionDescription(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CaptionDescription(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfCaptionDescriptionPreset = (
   input: Array<CaptionDescriptionPreset>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CaptionDescriptionPreset(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1CaptionDescriptionPreset(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfCmafAdditionalManifest = (
   input: Array<CmafAdditionalManifest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CmafAdditionalManifest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1CmafAdditionalManifest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfDashAdditionalManifest = (
   input: Array<DashAdditionalManifest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DashAdditionalManifest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1DashAdditionalManifest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfHlsAdMarkers = (
   input: Array<HlsAdMarkers | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfHlsAdditionalManifest = (
   input: Array<HlsAdditionalManifest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1HlsAdditionalManifest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1HlsAdditionalManifest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfHlsCaptionLanguageMapping = (
   input: Array<HlsCaptionLanguageMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1HlsCaptionLanguageMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1HlsCaptionLanguageMapping(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfId3Insertion = (
   input: Array<Id3Insertion>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Id3Insertion(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Id3Insertion(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInput = (
   input: Array<Input>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Input(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Input(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInputClipping = (
   input: Array<InputClipping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InputClipping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InputClipping(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInputTemplate = (
   input: Array<InputTemplate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InputTemplate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InputTemplate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInsertableImage = (
   input: Array<InsertableImage>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InsertableImage(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InsertableImage(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfMsSmoothAdditionalManifest = (
   input: Array<MsSmoothAdditionalManifest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MsSmoothAdditionalManifest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1MsSmoothAdditionalManifest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfOutput = (
   input: Array<Output>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Output(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Output(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfOutputChannelMapping = (
   input: Array<OutputChannelMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1OutputChannelMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1OutputChannelMapping(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfOutputGroup = (
   input: Array<OutputGroup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1OutputGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1OutputGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfTeletextPageType = (
   input: Array<TeletextPageType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__integerMin1Max2147483647 = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__integerMin32Max8182 = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__integerMinNegative60Max6 = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__stringMin1 = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__stringMin36Max36Pattern09aFAF809aFAF409aFAF409aFAF409aFAF12 = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__stringPattern09aFAF809aFAF409aFAF409aFAF409aFAF12 = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__stringPatternS3ASSETMAPXml = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__mapOfAudioSelector = (
diff --git a/clients/client-medialive/protocols/Aws_restJson1_1.ts b/clients/client-medialive/protocols/Aws_restJson1_1.ts
index 58f7051e966ac..6c7e5ffef28a9 100644
--- a/clients/client-medialive/protocols/Aws_restJson1_1.ts
+++ b/clients/client-medialive/protocols/Aws_restJson1_1.ts
@@ -12000,206 +12000,270 @@ const serializeAws_restJson1_1__listOfAudioChannelMapping = (
   input: Array<AudioChannelMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AudioChannelMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AudioChannelMapping(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfAudioDescription = (
   input: Array<AudioDescription>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AudioDescription(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AudioDescription(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfAudioSelector = (
   input: Array<AudioSelector>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AudioSelector(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AudioSelector(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfCaptionDescription = (
   input: Array<CaptionDescription>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CaptionDescription(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CaptionDescription(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfCaptionLanguageMapping = (
   input: Array<CaptionLanguageMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CaptionLanguageMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1CaptionLanguageMapping(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfCaptionSelector = (
   input: Array<CaptionSelector>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CaptionSelector(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CaptionSelector(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfHlsAdMarkers = (
   input: Array<HlsAdMarkers | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInputAttachment = (
   input: Array<InputAttachment>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InputAttachment(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InputAttachment(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInputChannelLevel = (
   input: Array<InputChannelLevel>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InputChannelLevel(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InputChannelLevel(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInputDestinationRequest = (
   input: Array<InputDestinationRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InputDestinationRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1InputDestinationRequest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInputSourceRequest = (
   input: Array<InputSourceRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InputSourceRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InputSourceRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfInputWhitelistRuleCidr = (
   input: Array<InputWhitelistRuleCidr>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InputWhitelistRuleCidr(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1InputWhitelistRuleCidr(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfMediaConnectFlowRequest = (
   input: Array<MediaConnectFlowRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MediaConnectFlowRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1MediaConnectFlowRequest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfMediaPackageOutputDestinationSettings = (
   input: Array<MediaPackageOutputDestinationSettings>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MediaPackageOutputDestinationSettings(
-      entry,
-      context
-    )
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1MediaPackageOutputDestinationSettings(
+        entry,
+        context
+      )
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfOutput = (
   input: Array<Output>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Output(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Output(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfOutputDestination = (
   input: Array<OutputDestination>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1OutputDestination(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1OutputDestination(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfOutputDestinationSettings = (
   input: Array<OutputDestinationSettings>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1OutputDestinationSettings(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1OutputDestinationSettings(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfOutputGroup = (
   input: Array<OutputGroup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1OutputGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1OutputGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfPipelinePauseStateSettings = (
   input: Array<PipelinePauseStateSettings>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1PipelinePauseStateSettings(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1PipelinePauseStateSettings(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfScheduleAction = (
   input: Array<ScheduleAction>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ScheduleAction(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ScheduleAction(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfScte35Descriptor = (
   input: Array<Scte35Descriptor>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Scte35Descriptor(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Scte35Descriptor(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfVideoDescription = (
   input: Array<VideoDescription>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1VideoDescription(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1VideoDescription(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1AacSettings = (
diff --git a/clients/client-mediapackage-vod/protocols/Aws_restJson1_1.ts b/clients/client-mediapackage-vod/protocols/Aws_restJson1_1.ts
index 1bb3a22998786..9cf5a0dfebaaf 100644
--- a/clients/client-mediapackage-vod/protocols/Aws_restJson1_1.ts
+++ b/clients/client-mediapackage-vod/protocols/Aws_restJson1_1.ts
@@ -2269,34 +2269,44 @@ const serializeAws_restJson1_1__listOfDashManifest = (
   input: Array<DashManifest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DashManifest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DashManifest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfHlsManifest = (
   input: Array<HlsManifest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1HlsManifest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1HlsManifest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfMssManifest = (
   input: Array<MssManifest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MssManifest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1MssManifest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1AssetShallow = (
diff --git a/clients/client-mediapackage/protocols/Aws_restJson1_1.ts b/clients/client-mediapackage/protocols/Aws_restJson1_1.ts
index ad223218ab7d7..57bf35787c7a0 100644
--- a/clients/client-mediapackage/protocols/Aws_restJson1_1.ts
+++ b/clients/client-mediapackage/protocols/Aws_restJson1_1.ts
@@ -3067,7 +3067,11 @@ const serializeAws_restJson1_1AdTriggers = (
   input: Array<__AdTriggersElement | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Authorization = (
@@ -3446,23 +3450,38 @@ const serializeAws_restJson1_1__listOfHlsManifestCreateOrUpdateParameters = (
   input: Array<HlsManifestCreateOrUpdateParameters>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1HlsManifestCreateOrUpdateParameters(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1HlsManifestCreateOrUpdateParameters(
+        entry,
+        context
+      )
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__PeriodTriggersElement = (
   input: Array<__PeriodTriggersElement | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__mapOf__string = (
diff --git a/clients/client-mediastore/protocols/Aws_json1_1.ts b/clients/client-mediastore/protocols/Aws_json1_1.ts
index 14b0f19ed4e73..2080973147f99 100644
--- a/clients/client-mediastore/protocols/Aws_json1_1.ts
+++ b/clients/client-mediastore/protocols/Aws_json1_1.ts
@@ -1963,30 +1963,44 @@ const serializeAws_json1_1AllowedHeaders = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AllowedMethods = (
   input: Array<MethodName | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AllowedOrigins = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CorsPolicy = (
   input: Array<CorsRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CorsRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CorsRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CorsRule = (
@@ -2097,7 +2111,11 @@ const serializeAws_json1_1ExposeHeaders = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetContainerPolicyInput = (
@@ -2240,14 +2258,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceInput = (
diff --git a/clients/client-migration-hub/protocols/Aws_json1_1.ts b/clients/client-migration-hub/protocols/Aws_json1_1.ts
index b4cbd13a9eada..08c1059d5f24c 100644
--- a/clients/client-migration-hub/protocols/Aws_json1_1.ts
+++ b/clients/client-migration-hub/protocols/Aws_json1_1.ts
@@ -2677,7 +2677,11 @@ const serializeAws_json1_1ApplicationIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociateCreatedArtifactRequest = (
@@ -3048,9 +3052,11 @@ const serializeAws_json1_1ResourceAttributeList = (
   input: Array<ResourceAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResourceAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ResourceAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Task = (
diff --git a/clients/client-mq/protocols/Aws_restJson1_1.ts b/clients/client-mq/protocols/Aws_restJson1_1.ts
index 5a81a26673ee1..090c4b9fd2527 100644
--- a/clients/client-mq/protocols/Aws_restJson1_1.ts
+++ b/clients/client-mq/protocols/Aws_restJson1_1.ts
@@ -3480,16 +3480,22 @@ const serializeAws_restJson1_1__listOfUser = (
   input: Array<User>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1User(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1User(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__mapOf__string = (
diff --git a/clients/client-mturk/protocols/Aws_json1_1.ts b/clients/client-mturk/protocols/Aws_json1_1.ts
index 01af489a708d6..bc1a1bfaca585 100644
--- a/clients/client-mturk/protocols/Aws_json1_1.ts
+++ b/clients/client-mturk/protocols/Aws_json1_1.ts
@@ -3703,7 +3703,11 @@ const serializeAws_json1_1AssignmentStatusList = (
   input: Array<AssignmentStatus | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociateQualificationWithWorkerRequest = (
@@ -3957,7 +3961,11 @@ const serializeAws_json1_1CustomerIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteHITRequest = (
@@ -4017,7 +4025,11 @@ const serializeAws_json1_1EventTypeList = (
   input: Array<EventType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetAccountBalanceRequest = (
@@ -4107,16 +4119,22 @@ const serializeAws_json1_1HITLayoutParameterList = (
   input: Array<HITLayoutParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1HITLayoutParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1HITLayoutParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IntegerList = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListAssignmentsForHITRequest = (
@@ -4334,7 +4352,11 @@ const serializeAws_json1_1LocaleList = (
   input: Array<Locale>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Locale(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Locale(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1NotificationSpecification = (
@@ -4401,9 +4423,11 @@ const serializeAws_json1_1ParameterMapEntryList = (
   input: Array<ParameterMapEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ParameterMapEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ParameterMapEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PolicyParameter = (
@@ -4433,9 +4457,11 @@ const serializeAws_json1_1PolicyParameterList = (
   input: Array<PolicyParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PolicyParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PolicyParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1QualificationRequirement = (
@@ -4474,9 +4500,11 @@ const serializeAws_json1_1QualificationRequirementList = (
   input: Array<QualificationRequirement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1QualificationRequirement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1QualificationRequirement(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RejectAssignmentRequest = (
@@ -4528,7 +4556,11 @@ const serializeAws_json1_1ReviewPolicyLevelList = (
   input: Array<ReviewPolicyLevel | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SendBonusRequest = (
@@ -4575,7 +4607,11 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateExpirationForHITRequest = (
diff --git a/clients/client-neptune/protocols/Aws_query.ts b/clients/client-neptune/protocols/Aws_query.ts
index 2d629968389a1..a843d6010c8e7 100644
--- a/clients/client-neptune/protocols/Aws_query.ts
+++ b/clients/client-neptune/protocols/Aws_query.ts
@@ -7685,10 +7685,10 @@ const serializeAws_queryAttributeValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AttributeValue.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7698,10 +7698,10 @@ const serializeAws_queryAvailabilityZones = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AvailabilityZone.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8241,10 +8241,10 @@ const serializeAws_queryDBSecurityGroupNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`DBSecurityGroupName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8810,10 +8810,10 @@ const serializeAws_queryEventCategoriesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`EventCategory.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8858,13 +8858,13 @@ const serializeAws_queryFilterList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryFilter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Filter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8874,10 +8874,10 @@ const serializeAws_queryFilterValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Value.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8887,10 +8887,10 @@ const serializeAws_queryKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8918,10 +8918,10 @@ const serializeAws_queryLogTypeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -9308,13 +9308,13 @@ const serializeAws_queryParametersList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryParameter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Parameter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -9597,10 +9597,10 @@ const serializeAws_querySourceIdsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SourceId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -9610,10 +9610,10 @@ const serializeAws_querySubnetIdentifierList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SubnetIdentifier.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -9634,13 +9634,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Tag.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -9650,10 +9650,10 @@ const serializeAws_queryVpcSecurityGroupIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VpcSecurityGroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-networkmanager/protocols/Aws_restJson1_1.ts b/clients/client-networkmanager/protocols/Aws_restJson1_1.ts
index cb98370ff8858..1888424fdc4ff 100644
--- a/clients/client-networkmanager/protocols/Aws_restJson1_1.ts
+++ b/clients/client-networkmanager/protocols/Aws_restJson1_1.ts
@@ -4665,9 +4665,11 @@ const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1Bandwidth = (
diff --git a/clients/client-opsworks/protocols/Aws_json1_1.ts b/clients/client-opsworks/protocols/Aws_json1_1.ts
index df9d49c00a387..7c38a414020bb 100644
--- a/clients/client-opsworks/protocols/Aws_json1_1.ts
+++ b/clients/client-opsworks/protocols/Aws_json1_1.ts
@@ -6605,9 +6605,11 @@ const serializeAws_json1_1BlockDeviceMappings = (
   input: Array<BlockDeviceMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1BlockDeviceMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1BlockDeviceMapping(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ChefConfiguration = (
@@ -6777,9 +6779,11 @@ const serializeAws_json1_1CloudWatchLogsLogStreams = (
   input: Array<CloudWatchLogsLogStream>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CloudWatchLogsLogStream(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CloudWatchLogsLogStream(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateAppRequest = (
@@ -7167,9 +7171,11 @@ const serializeAws_json1_1DataSources = (
   input: Array<DataSource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DataSource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DataSource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteAppRequest = (
@@ -7724,9 +7730,11 @@ const serializeAws_json1_1EnvironmentVariables = (
   input: Array<EnvironmentVariable>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EnvironmentVariable(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EnvironmentVariable(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetHostnameSuggestionRequest = (
@@ -8149,14 +8157,22 @@ const serializeAws_json1_1Strings = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -8597,9 +8613,11 @@ const serializeAws_json1_1VolumeConfigurations = (
   input: Array<VolumeConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1VolumeConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1VolumeConfiguration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1WeeklyAutoScalingSchedule = (
diff --git a/clients/client-opsworkscm/protocols/Aws_json1_1.ts b/clients/client-opsworkscm/protocols/Aws_json1_1.ts
index 8472dc887034e..822eb0311998f 100644
--- a/clients/client-opsworkscm/protocols/Aws_json1_1.ts
+++ b/clients/client-opsworkscm/protocols/Aws_json1_1.ts
@@ -2265,9 +2265,11 @@ const serializeAws_json1_1EngineAttributes = (
   input: Array<EngineAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EngineAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EngineAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ExportServerEngineAttributeRequest = (
@@ -2348,7 +2350,11 @@ const serializeAws_json1_1Strings = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -2366,14 +2372,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-organizations/protocols/Aws_json1_1.ts b/clients/client-organizations/protocols/Aws_json1_1.ts
index 6440e1417e51c..145e7aea10bcd 100644
--- a/clients/client-organizations/protocols/Aws_json1_1.ts
+++ b/clients/client-organizations/protocols/Aws_json1_1.ts
@@ -7856,7 +7856,11 @@ const serializeAws_json1_1CreateAccountStates = (
   input: Array<CreateAccountState | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateGovCloudAccountRequest = (
@@ -8427,7 +8431,11 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -8448,7 +8456,11 @@ const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceRequest = (
diff --git a/clients/client-personalize-events/protocols/Aws_restJson1_1.ts b/clients/client-personalize-events/protocols/Aws_restJson1_1.ts
index 71bb2458b5418..da4e819fb6a4e 100644
--- a/clients/client-personalize-events/protocols/Aws_restJson1_1.ts
+++ b/clients/client-personalize-events/protocols/Aws_restJson1_1.ts
@@ -145,9 +145,11 @@ const serializeAws_restJson1_1EventList = (
   input: Array<Event>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Event(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Event(entry, context));
+  }
+  return contents;
 };
 
 const deserializeMetadata = (output: __HttpResponse): __ResponseMetadata => ({
diff --git a/clients/client-personalize-runtime/protocols/Aws_restJson1_1.ts b/clients/client-personalize-runtime/protocols/Aws_restJson1_1.ts
index b95c807327993..6b6acacdcfd2d 100644
--- a/clients/client-personalize-runtime/protocols/Aws_restJson1_1.ts
+++ b/clients/client-personalize-runtime/protocols/Aws_restJson1_1.ts
@@ -295,7 +295,11 @@ const serializeAws_restJson1_1InputList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ItemList = (
diff --git a/clients/client-personalize/protocols/Aws_json1_1.ts b/clients/client-personalize/protocols/Aws_json1_1.ts
index 63ec914ae6504..8e222000c4371 100644
--- a/clients/client-personalize/protocols/Aws_json1_1.ts
+++ b/clients/client-personalize/protocols/Aws_json1_1.ts
@@ -3952,7 +3952,11 @@ const serializeAws_json1_1ArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutoMLConfig = (
@@ -4021,16 +4025,24 @@ const serializeAws_json1_1CategoricalHyperParameterRanges = (
   input: Array<CategoricalHyperParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CategoricalHyperParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1CategoricalHyperParameterRange(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CategoricalValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContinuousHyperParameterRange = (
@@ -4054,9 +4066,13 @@ const serializeAws_json1_1ContinuousHyperParameterRanges = (
   input: Array<ContinuousHyperParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ContinuousHyperParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ContinuousHyperParameterRange(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateBatchInferenceJobRequest = (
@@ -4596,9 +4612,13 @@ const serializeAws_json1_1IntegerHyperParameterRanges = (
   input: Array<IntegerHyperParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IntegerHyperParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1IntegerHyperParameterRange(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListBatchInferenceJobsRequest = (
diff --git a/clients/client-pi/protocols/Aws_json1_1.ts b/clients/client-pi/protocols/Aws_json1_1.ts
index fe3b775a842f4..29a4909ceb3df 100644
--- a/clients/client-pi/protocols/Aws_json1_1.ts
+++ b/clients/client-pi/protocols/Aws_json1_1.ts
@@ -425,16 +425,22 @@ const serializeAws_json1_1MetricQueryList = (
   input: Array<MetricQuery>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MetricQuery(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MetricQuery(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1InternalServiceError = (
diff --git a/clients/client-pinpoint-email/protocols/Aws_restJson1_1.ts b/clients/client-pinpoint-email/protocols/Aws_restJson1_1.ts
index 05ffaa465f6fb..881feb95d1702 100644
--- a/clients/client-pinpoint-email/protocols/Aws_restJson1_1.ts
+++ b/clients/client-pinpoint-email/protocols/Aws_restJson1_1.ts
@@ -5461,9 +5461,11 @@ const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Body = (
@@ -5517,9 +5519,13 @@ const serializeAws_restJson1_1CloudWatchDimensionConfigurations = (
   input: Array<CloudWatchDimensionConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CloudWatchDimensionConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1CloudWatchDimensionConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Content = (
@@ -5604,16 +5610,24 @@ const serializeAws_restJson1_1DomainDeliverabilityTrackingOptions = (
   input: Array<DomainDeliverabilityTrackingOption>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DomainDeliverabilityTrackingOption(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1DomainDeliverabilityTrackingOption(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1EmailAddressList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1EmailContent = (
@@ -5690,7 +5704,11 @@ const serializeAws_restJson1_1EventTypes = (
   input: Array<EventType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1InboxPlacementTrackingOption = (
@@ -5714,7 +5732,11 @@ const serializeAws_restJson1_1IspNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1KinesisFirehoseDestination = (
@@ -5766,9 +5788,11 @@ const serializeAws_restJson1_1MessageTagList = (
   input: Array<MessageTag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MessageTag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1MessageTag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PinpointDestination = (
diff --git a/clients/client-pinpoint-sms-voice/protocols/Aws_restJson1_1.ts b/clients/client-pinpoint-sms-voice/protocols/Aws_restJson1_1.ts
index 0fdf709e8f54c..698d1e20466eb 100644
--- a/clients/client-pinpoint-sms-voice/protocols/Aws_restJson1_1.ts
+++ b/clients/client-pinpoint-sms-voice/protocols/Aws_restJson1_1.ts
@@ -1253,7 +1253,11 @@ const serializeAws_restJson1_1EventTypes = (
   input: Array<EventType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1KinesisFirehoseDestination = (
diff --git a/clients/client-pinpoint/protocols/Aws_restJson1_1.ts b/clients/client-pinpoint/protocols/Aws_restJson1_1.ts
index dadb5bcb29846..93a14b2913702 100644
--- a/clients/client-pinpoint/protocols/Aws_restJson1_1.ts
+++ b/clients/client-pinpoint/protocols/Aws_restJson1_1.ts
@@ -17974,79 +17974,103 @@ const serializeAws_restJson1_1ListOfEndpointBatchItem = (
   input: Array<EndpointBatchItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1EndpointBatchItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1EndpointBatchItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfMultiConditionalBranch = (
   input: Array<MultiConditionalBranch>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MultiConditionalBranch(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1MultiConditionalBranch(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfRandomSplitEntry = (
   input: Array<RandomSplitEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1RandomSplitEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1RandomSplitEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfSegmentDimensions = (
   input: Array<SegmentDimensions>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SegmentDimensions(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SegmentDimensions(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfSegmentGroup = (
   input: Array<SegmentGroup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SegmentGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SegmentGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfSegmentReference = (
   input: Array<SegmentReference>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SegmentReference(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SegmentReference(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfSimpleCondition = (
   input: Array<SimpleCondition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SimpleCondition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SimpleCondition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfWriteTreatmentResource = (
   input: Array<WriteTreatmentResource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1WriteTreatmentResource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1WriteTreatmentResource(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1MapOfActivity = (
diff --git a/clients/client-polly/protocols/Aws_restJson1_1.ts b/clients/client-polly/protocols/Aws_restJson1_1.ts
index af838fa8fc4bb..db0f62ec6bbae 100644
--- a/clients/client-polly/protocols/Aws_restJson1_1.ts
+++ b/clients/client-polly/protocols/Aws_restJson1_1.ts
@@ -1626,14 +1626,22 @@ const serializeAws_restJson1_1LexiconNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SpeechMarkTypeList = (
   input: Array<SpeechMarkType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1EngineList = (
diff --git a/clients/client-pricing/protocols/Aws_json1_1.ts b/clients/client-pricing/protocols/Aws_json1_1.ts
index 1f5f5fb995b37..b331d471ad4e1 100644
--- a/clients/client-pricing/protocols/Aws_json1_1.ts
+++ b/clients/client-pricing/protocols/Aws_json1_1.ts
@@ -513,7 +513,11 @@ const serializeAws_json1_1Filters = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetAttributeValuesRequest = (
diff --git a/clients/client-qldb-session/protocols/Aws_json1_0.ts b/clients/client-qldb-session/protocols/Aws_json1_0.ts
index 381789c898324..fbda135d54f42 100644
--- a/clients/client-qldb-session/protocols/Aws_json1_0.ts
+++ b/clients/client-qldb-session/protocols/Aws_json1_0.ts
@@ -389,9 +389,11 @@ const serializeAws_json1_0StatementParameters = (
   input: Array<ValueHolder>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ValueHolder(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0ValueHolder(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ValueHolder = (
diff --git a/clients/client-quicksight/protocols/Aws_restJson1_1.ts b/clients/client-quicksight/protocols/Aws_restJson1_1.ts
index 57eda5a6a9dd4..f8a4b959e6c7e 100644
--- a/clients/client-quicksight/protocols/Aws_restJson1_1.ts
+++ b/clients/client-quicksight/protocols/Aws_restJson1_1.ts
@@ -12388,9 +12388,11 @@ const serializeAws_restJson1_1CalculatedColumnList = (
   input: Array<CalculatedColumn>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CalculatedColumn(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1CalculatedColumn(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CastColumnTypeOperation = (
@@ -12430,16 +12432,22 @@ const serializeAws_restJson1_1ColumnGroupList = (
   input: Array<ColumnGroup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ColumnGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ColumnGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ColumnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ColumnTag = (
@@ -12457,9 +12465,11 @@ const serializeAws_restJson1_1ColumnTagList = (
   input: Array<ColumnTag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ColumnTag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ColumnTag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1CreateColumnsOperation = (
@@ -12596,9 +12606,11 @@ const serializeAws_restJson1_1DataSetReferenceList = (
   input: Array<DataSetReference>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DataSetReference(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DataSetReference(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DataSourceCredentials = (
@@ -12776,9 +12788,11 @@ const serializeAws_restJson1_1DateTimeParameterList = (
   input: Array<DateTimeParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DateTimeParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DateTimeParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DecimalParameter = (
@@ -12802,9 +12816,11 @@ const serializeAws_restJson1_1DecimalParameterList = (
   input: Array<DecimalParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DecimalParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DecimalParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ExportToCSVOption = (
@@ -12867,7 +12883,11 @@ const serializeAws_restJson1_1IdentityNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1InputColumn = (
@@ -12888,9 +12908,11 @@ const serializeAws_restJson1_1InputColumnList = (
   input: Array<InputColumn>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1InputColumn(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1InputColumn(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1IntegerParameter = (
@@ -12914,9 +12936,11 @@ const serializeAws_restJson1_1IntegerParameterList = (
   input: Array<IntegerParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1IntegerParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1IntegerParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1JiraParameters = (
@@ -13182,7 +13206,11 @@ const serializeAws_restJson1_1ProjectedColumnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1RdsParameters = (
@@ -13411,9 +13439,11 @@ const serializeAws_restJson1_1StringParameterList = (
   input: Array<StringParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1StringParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1StringParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagColumnOperation = (
@@ -13560,9 +13590,11 @@ const serializeAws_restJson1_1TransformOperationList = (
   input: Array<TransformOperation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TransformOperation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1TransformOperation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TwitterParameters = (
@@ -13583,9 +13615,11 @@ const serializeAws_restJson1_1UpdateResourcePermissionList = (
   input: Array<ResourcePermission>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ResourcePermission(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ResourcePermission(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1UploadSettings = (
@@ -13626,21 +13660,33 @@ const serializeAws_restJson1_1ActionList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DoubleList = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LongList = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourcePermission = (
@@ -13664,16 +13710,22 @@ const serializeAws_restJson1_1ResourcePermissionList = (
   input: Array<ResourcePermission>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ResourcePermission(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ResourcePermission(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tag = (
@@ -13694,16 +13746,22 @@ const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TimestampList = (
   input: Array<Date>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => Math.round(entry.getTime() / 1000));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(Math.round(entry.getTime() / 1000));
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ActiveIAMPolicyAssignment = (
diff --git a/clients/client-ram/protocols/Aws_restJson1_1.ts b/clients/client-ram/protocols/Aws_restJson1_1.ts
index 69c1e70e00bbf..56853a6204b32 100644
--- a/clients/client-ram/protocols/Aws_restJson1_1.ts
+++ b/clients/client-ram/protocols/Aws_restJson1_1.ts
@@ -4183,35 +4183,55 @@ const serializeAws_restJson1_1PermissionArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PrincipalArnOrIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourceArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourceShareArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourceShareInvitationArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tag = (
@@ -4249,32 +4269,44 @@ const serializeAws_restJson1_1TagFilters = (
   input: Array<TagFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TagFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1TagFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1PolicyList = (
diff --git a/clients/client-rds-data/protocols/Aws_restJson1_1.ts b/clients/client-rds-data/protocols/Aws_restJson1_1.ts
index b1dfc4e4d89fc..bda297ebd42c9 100644
--- a/clients/client-rds-data/protocols/Aws_restJson1_1.ts
+++ b/clients/client-rds-data/protocols/Aws_restJson1_1.ts
@@ -988,9 +988,11 @@ const serializeAws_restJson1_1ArrayOfArray = (
   input: Array<ArrayValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ArrayValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ArrayValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ArrayValue = (
@@ -1012,14 +1014,22 @@ const serializeAws_restJson1_1BooleanArray = (
   input: Array<boolean>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DoubleArray = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Field = (
@@ -1042,7 +1052,11 @@ const serializeAws_restJson1_1LongArray = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SqlParameter = (
@@ -1063,25 +1077,33 @@ const serializeAws_restJson1_1SqlParameterSets = (
   input: Array<Array<SqlParameter>>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SqlParametersList(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SqlParametersList(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SqlParametersList = (
   input: Array<SqlParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SqlParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SqlParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StringArray = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ArrayOfArray = (
diff --git a/clients/client-rds/protocols/Aws_query.ts b/clients/client-rds/protocols/Aws_query.ts
index 33159879b647b..efb08d368d975 100644
--- a/clients/client-rds/protocols/Aws_query.ts
+++ b/clients/client-rds/protocols/Aws_query.ts
@@ -16616,10 +16616,10 @@ const serializeAws_queryAttributeValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AttributeValue.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -16652,10 +16652,10 @@ const serializeAws_queryAvailabilityZones = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AvailabilityZone.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -17696,10 +17696,10 @@ const serializeAws_queryDBSecurityGroupNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`DBSecurityGroupName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -18964,10 +18964,10 @@ const serializeAws_queryEngineModeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -18977,10 +18977,10 @@ const serializeAws_queryEventCategoriesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`EventCategory.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19025,13 +19025,13 @@ const serializeAws_queryFilterList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryFilter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Filter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19041,10 +19041,10 @@ const serializeAws_queryFilterValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`Value.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19077,10 +19077,10 @@ const serializeAws_queryKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19108,10 +19108,10 @@ const serializeAws_queryLogTypeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19799,13 +19799,13 @@ const serializeAws_queryOptionConfigurationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryOptionConfiguration(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`OptionConfiguration.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19815,10 +19815,10 @@ const serializeAws_queryOptionNamesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19863,13 +19863,13 @@ const serializeAws_queryOptionSettingsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryOptionSetting(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`OptionSetting.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19927,13 +19927,13 @@ const serializeAws_queryParametersList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryParameter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Parameter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -19957,13 +19957,13 @@ const serializeAws_queryProcessorFeatureList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryProcessorFeature(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`ProcessorFeature.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -20964,10 +20964,10 @@ const serializeAws_querySourceIdsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SourceId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -21058,10 +21058,10 @@ const serializeAws_queryStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -21071,10 +21071,10 @@ const serializeAws_querySubnetIdentifierList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SubnetIdentifier.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -21095,13 +21095,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Tag.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -21134,13 +21134,13 @@ const serializeAws_queryUserAuthConfigList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryUserAuthConfig(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -21150,10 +21150,10 @@ const serializeAws_queryVpcSecurityGroupIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VpcSecurityGroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-redshift/protocols/Aws_query.ts b/clients/client-redshift/protocols/Aws_query.ts
index eeb9d75f3c3d3..53bb45612a6ba 100644
--- a/clients/client-redshift/protocols/Aws_query.ts
+++ b/clients/client-redshift/protocols/Aws_query.ts
@@ -11952,10 +11952,10 @@ const serializeAws_queryAttributeNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`AttributeName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -12056,10 +12056,10 @@ const serializeAws_queryClusterSecurityGroupNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ClusterSecurityGroupName.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -12535,10 +12535,10 @@ const serializeAws_queryDbGroupList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`DbGroup.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -12606,7 +12606,7 @@ const serializeAws_queryDeleteClusterSnapshotMessageList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryDeleteClusterSnapshotMessage(
       entry,
       context
@@ -12616,7 +12616,7 @@ const serializeAws_queryDeleteClusterSnapshotMessageList = (
         memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -13514,10 +13514,10 @@ const serializeAws_queryEventCategoriesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`EventCategory.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -13577,10 +13577,10 @@ const serializeAws_queryIamRoleArnList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`IamRoleArn.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -13980,7 +13980,7 @@ const serializeAws_queryNodeConfigurationOptionsFilterList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryNodeConfigurationOptionsFilter(
       entry,
       context
@@ -13990,7 +13990,7 @@ const serializeAws_queryNodeConfigurationOptionsFilterList = (
         memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14035,13 +14035,13 @@ const serializeAws_queryParametersList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryParameter(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Parameter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14313,10 +14313,10 @@ const serializeAws_queryScheduleDefinitionList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`ScheduleDefinition.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14347,7 +14347,7 @@ const serializeAws_queryScheduledActionFilterList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryScheduledActionFilter(
       entry,
       context
@@ -14356,7 +14356,7 @@ const serializeAws_queryScheduledActionFilterList = (
       entries[`ScheduledActionFilter.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14384,10 +14384,10 @@ const serializeAws_querySnapshotIdentifierList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`String.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14411,7 +14411,7 @@ const serializeAws_querySnapshotSortingEntityList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_querySnapshotSortingEntity(
       entry,
       context
@@ -14420,7 +14420,7 @@ const serializeAws_querySnapshotSortingEntityList = (
       entries[`SnapshotSortingEntity.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14430,10 +14430,10 @@ const serializeAws_querySourceIdsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SourceId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14443,10 +14443,10 @@ const serializeAws_querySubnetIdentifierList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`SubnetIdentifier.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14467,10 +14467,10 @@ const serializeAws_queryTagKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`TagKey.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14480,13 +14480,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`Tag.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14496,10 +14496,10 @@ const serializeAws_queryTagValueList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`TagValue.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14509,10 +14509,10 @@ const serializeAws_queryValueStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`item.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -14522,10 +14522,10 @@ const serializeAws_queryVpcSecurityGroupIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`VpcSecurityGroupId.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-rekognition/protocols/Aws_json1_1.ts b/clients/client-rekognition/protocols/Aws_json1_1.ts
index cff0187c20541..1ab356d769ada 100644
--- a/clients/client-rekognition/protocols/Aws_json1_1.ts
+++ b/clients/client-rekognition/protocols/Aws_json1_1.ts
@@ -6406,14 +6406,22 @@ const serializeAws_json1_1Assets = (
   input: Array<Asset>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Asset(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Asset(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Attributes = (
   input: Array<Attribute | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CompareFacesRequest = (
@@ -6446,7 +6454,11 @@ const serializeAws_json1_1ContentClassifiers = (
   input: Array<ContentClassifier | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateCollectionRequest = (
@@ -6722,7 +6734,11 @@ const serializeAws_json1_1FaceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FaceSearchSettings = (
@@ -7398,7 +7414,11 @@ const serializeAws_json1_1VersionNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Video = (
diff --git a/clients/client-resource-groups-tagging-api/protocols/Aws_json1_1.ts b/clients/client-resource-groups-tagging-api/protocols/Aws_json1_1.ts
index 4a5ada63075ed..1314608cd2e31 100644
--- a/clients/client-resource-groups-tagging-api/protocols/Aws_json1_1.ts
+++ b/clients/client-resource-groups-tagging-api/protocols/Aws_json1_1.ts
@@ -1123,28 +1123,44 @@ const serializeAws_json1_1GroupBy = (
   input: Array<GroupByAttribute | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegionFilterList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceARNList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceTypeFilterList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartReportCreationInput = (
@@ -1179,23 +1195,33 @@ const serializeAws_json1_1TagFilterList = (
   input: Array<TagFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TagFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TagFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagKeyFilterList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagKeyListForUntag = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagMap = (
@@ -1230,14 +1256,22 @@ const serializeAws_json1_1TagValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetIdFilterList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourcesInput = (
diff --git a/clients/client-resource-groups/protocols/Aws_restJson1_1.ts b/clients/client-resource-groups/protocols/Aws_restJson1_1.ts
index f0f5296546ac3..66934f04f7d22 100644
--- a/clients/client-resource-groups/protocols/Aws_restJson1_1.ts
+++ b/clients/client-resource-groups/protocols/Aws_restJson1_1.ts
@@ -1965,16 +1965,22 @@ const serializeAws_restJson1_1GroupFilterList = (
   input: Array<GroupFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1GroupFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1GroupFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1GroupFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourceFilter = (
@@ -1998,16 +2004,22 @@ const serializeAws_restJson1_1ResourceFilterList = (
   input: Array<ResourceFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ResourceFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ResourceFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourceFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ResourceQuery = (
@@ -2028,7 +2040,11 @@ const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Tags = (
diff --git a/clients/client-robomaker/protocols/Aws_restJson1_1.ts b/clients/client-robomaker/protocols/Aws_restJson1_1.ts
index 67ad5320e574f..04d12a9100f4c 100644
--- a/clients/client-robomaker/protocols/Aws_restJson1_1.ts
+++ b/clients/client-robomaker/protocols/Aws_restJson1_1.ts
@@ -5591,7 +5591,11 @@ const serializeAws_restJson1_1Arns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DataSourceConfig = (
@@ -5618,9 +5622,11 @@ const serializeAws_restJson1_1DataSourceConfigs = (
   input: Array<DataSourceConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DataSourceConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DataSourceConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DeploymentApplicationConfig = (
@@ -5647,9 +5653,13 @@ const serializeAws_restJson1_1DeploymentApplicationConfigs = (
   input: Array<DeploymentApplicationConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DeploymentApplicationConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1DeploymentApplicationConfig(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DeploymentConfig = (
@@ -5737,16 +5747,22 @@ const serializeAws_restJson1_1FilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Filters = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Filter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LaunchConfig = (
@@ -5839,9 +5855,11 @@ const serializeAws_restJson1_1PortMappingList = (
   input: Array<PortMapping>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1PortMapping(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1PortMapping(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1RenderingEngine = (
@@ -5882,9 +5900,13 @@ const serializeAws_restJson1_1RobotApplicationConfigs = (
   input: Array<RobotApplicationConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1RobotApplicationConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1RobotApplicationConfig(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1RobotSoftwareSuite = (
@@ -5905,7 +5927,11 @@ const serializeAws_restJson1_1S3Keys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1S3Object = (
@@ -5929,7 +5955,11 @@ const serializeAws_restJson1_1SecurityGroups = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SimulationApplicationConfig = (
@@ -5956,9 +5986,13 @@ const serializeAws_restJson1_1SimulationApplicationConfigs = (
   input: Array<SimulationApplicationConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SimulationApplicationConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1SimulationApplicationConfig(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SimulationSoftwareSuite = (
@@ -5996,16 +6030,22 @@ const serializeAws_restJson1_1SourceConfigs = (
   input: Array<SourceConfig>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SourceConfig(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SourceConfig(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Subnets = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
diff --git a/clients/client-route-53-domains/protocols/Aws_json1_1.ts b/clients/client-route-53-domains/protocols/Aws_json1_1.ts
index 9481700285971..b7b55c654d605 100644
--- a/clients/client-route-53-domains/protocols/Aws_json1_1.ts
+++ b/clients/client-route-53-domains/protocols/Aws_json1_1.ts
@@ -2783,9 +2783,11 @@ const serializeAws_json1_1ExtraParamList = (
   input: Array<ExtraParam>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ExtraParam(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ExtraParam(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetContactReachabilityStatusRequest = (
@@ -2842,7 +2844,11 @@ const serializeAws_json1_1GlueIpList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListDomainsRequest = (
@@ -2910,9 +2916,11 @@ const serializeAws_json1_1NameserverList = (
   input: Array<Nameserver>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Nameserver(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Nameserver(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegisterDomainRequest = (
@@ -3017,14 +3025,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TransferDomainRequest = (
diff --git a/clients/client-route-53/protocols/Aws_restXml.ts b/clients/client-route-53/protocols/Aws_restXml.ts
index f43f27cd2d5c3..173ffb1d18a4e 100644
--- a/clients/client-route-53/protocols/Aws_restXml.ts
+++ b/clients/client-route-53/protocols/Aws_restXml.ts
@@ -8610,10 +8610,10 @@ const serializeAws_restXmlChanges = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlChange(entry, context);
     collectedNodes.push(node.withName("Change"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8622,12 +8622,12 @@ const serializeAws_restXmlChildHealthCheckList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("HealthCheckId").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("ChildHealthCheck"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8783,12 +8783,12 @@ const serializeAws_restXmlHealthCheckRegionList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("HealthCheckRegion").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("Region"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8817,12 +8817,12 @@ const serializeAws_restXmlResettableElementNameList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("ResettableElementName").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("ResettableElementName"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8938,10 +8938,10 @@ const serializeAws_restXmlResourceRecords = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlResourceRecord(entry, context);
     collectedNodes.push(node.withName("ResourceRecord"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8967,10 +8967,10 @@ const serializeAws_restXmlTagKeyList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("TagKey").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("Key"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8979,10 +8979,10 @@ const serializeAws_restXmlTagList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlTag(entry, context);
     collectedNodes.push(node.withName("Tag"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -8991,12 +8991,12 @@ const serializeAws_restXmlTagResourceIdList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("TagResourceId").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("ResourceId"));
-  });
+  }
   return collectedNodes;
 };
 
diff --git a/clients/client-route53resolver/protocols/Aws_json1_1.ts b/clients/client-route53resolver/protocols/Aws_json1_1.ts
index 175ff9b30c8d7..6ac2fd703c68f 100644
--- a/clients/client-route53resolver/protocols/Aws_json1_1.ts
+++ b/clients/client-route53resolver/protocols/Aws_json1_1.ts
@@ -3207,14 +3207,22 @@ const serializeAws_json1_1FilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Filters = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetResolverEndpointRequest = (
@@ -3296,9 +3304,11 @@ const serializeAws_json1_1IpAddressesRequest = (
   input: Array<IpAddressRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IpAddressRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1IpAddressRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListResolverEndpointIpAddressesRequest = (
@@ -3424,7 +3434,11 @@ const serializeAws_json1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -3442,14 +3456,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -3484,9 +3506,11 @@ const serializeAws_json1_1TargetList = (
   input: Array<TargetAddress>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TargetAddress(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TargetAddress(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UntagResourceRequest = (
diff --git a/clients/client-s3-control/protocols/Aws_restXml.ts b/clients/client-s3-control/protocols/Aws_restXml.ts
index 71b47bbc90e7e..70c23a105bd54 100644
--- a/clients/client-s3-control/protocols/Aws_restXml.ts
+++ b/clients/client-s3-control/protocols/Aws_restXml.ts
@@ -1932,12 +1932,12 @@ const serializeAws_restXmlJobManifestFieldList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("JobManifestFieldName").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -2295,10 +2295,10 @@ const serializeAws_restXmlS3GrantList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlS3Grant(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -2503,10 +2503,10 @@ const serializeAws_restXmlS3TagSet = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlS3Tag(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -3398,8 +3398,8 @@ const deserializeAws_restXmlS3UserMetadata = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
diff --git a/clients/client-s3/protocols/Aws_restXml.ts b/clients/client-s3/protocols/Aws_restXml.ts
index a5bc965e3eddc..5cea7e5f205f5 100644
--- a/clients/client-s3/protocols/Aws_restXml.ts
+++ b/clients/client-s3/protocols/Aws_restXml.ts
@@ -10170,12 +10170,12 @@ const serializeAws_restXmlAllowedHeaders = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("AllowedHeader").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10184,12 +10184,12 @@ const serializeAws_restXmlAllowedMethods = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("AllowedMethod").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10198,12 +10198,12 @@ const serializeAws_restXmlAllowedOrigins = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("AllowedOrigin").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10432,10 +10432,10 @@ const serializeAws_restXmlCORSRules = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlCORSRule(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10567,10 +10567,10 @@ const serializeAws_restXmlCompletedPartList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlCompletedPart(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10782,10 +10782,10 @@ const serializeAws_restXmlEventList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("Event").addChildNode(new __XmlText(entry));
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10808,12 +10808,12 @@ const serializeAws_restXmlExposeHeaders = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("ExposeHeader").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10842,10 +10842,10 @@ const serializeAws_restXmlFilterRuleList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlFilterRule(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -10925,10 +10925,10 @@ const serializeAws_restXmlGrants = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlGrant(entry, context);
     collectedNodes.push(node.withName("Grant"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -11080,12 +11080,12 @@ const serializeAws_restXmlInventoryOptionalFields = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = new __XmlNode("InventoryOptionalField").addChildNode(
       new __XmlText(entry)
     );
     collectedNodes.push(node.withName("Field"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -11209,13 +11209,13 @@ const serializeAws_restXmlLambdaFunctionConfigurationList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlLambdaFunctionConfiguration(
       entry,
       context
     );
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -11372,10 +11372,10 @@ const serializeAws_restXmlLifecycleRules = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlLifecycleRule(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -11551,13 +11551,13 @@ const serializeAws_restXmlNoncurrentVersionTransitionList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlNoncurrentVersionTransition(
       entry,
       context
     );
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -11636,10 +11636,10 @@ const serializeAws_restXmlObjectIdentifierList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlObjectIdentifier(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -11837,10 +11837,10 @@ const serializeAws_restXmlQueueConfigurationList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlQueueConfiguration(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -12041,10 +12041,10 @@ const serializeAws_restXmlReplicationRules = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlReplicationRule(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -12185,10 +12185,10 @@ const serializeAws_restXmlRoutingRules = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlRoutingRule(entry, context);
     collectedNodes.push(node.withName("RoutingRule"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -12405,10 +12405,10 @@ const serializeAws_restXmlServerSideEncryptionRules = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlServerSideEncryptionRule(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -12499,10 +12499,10 @@ const serializeAws_restXmlTagSet = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlTag(entry, context);
     collectedNodes.push(node.withName("Tag"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -12545,10 +12545,10 @@ const serializeAws_restXmlTargetGrants = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlTargetGrant(entry, context);
     collectedNodes.push(node.withName("Grant"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -12591,10 +12591,10 @@ const serializeAws_restXmlTopicConfigurationList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlTopicConfiguration(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -12629,10 +12629,10 @@ const serializeAws_restXmlTransitionList = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlTransition(entry, context);
     collectedNodes.push(node.withName("member"));
-  });
+  }
   return collectedNodes;
 };
 
@@ -12641,10 +12641,10 @@ const serializeAws_restXmlUserMetadata = (
   context: __SerdeContext
 ): any => {
   const collectedNodes: any = [];
-  (input || []).map(entry => {
+  for (let entry of input) {
     const node = serializeAws_restXmlMetadataEntry(entry, context);
     collectedNodes.push(node.withName("MetadataEntry"));
-  });
+  }
   return collectedNodes;
 };
 
diff --git a/clients/client-sagemaker-a2i-runtime/protocols/Aws_restJson1_1.ts b/clients/client-sagemaker-a2i-runtime/protocols/Aws_restJson1_1.ts
index 29ae770b56c5b..ddd7b38f6f2f9 100644
--- a/clients/client-sagemaker-a2i-runtime/protocols/Aws_restJson1_1.ts
+++ b/clients/client-sagemaker-a2i-runtime/protocols/Aws_restJson1_1.ts
@@ -782,7 +782,11 @@ const serializeAws_restJson1_1ContentClassifiers = (
   input: Array<ContentClassifier | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1HumanLoopInputContent = (
diff --git a/clients/client-sagemaker/protocols/Aws_json1_1.ts b/clients/client-sagemaker/protocols/Aws_json1_1.ts
index 7868322f89555..a9b60b98d6a1c 100644
--- a/clients/client-sagemaker/protocols/Aws_json1_1.ts
+++ b/clients/client-sagemaker/protocols/Aws_json1_1.ts
@@ -10712,7 +10712,11 @@ const serializeAws_json1_1AdditionalCodeRepositoryNamesOrUrls = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AlgorithmSpecification = (
@@ -10773,9 +10777,13 @@ const serializeAws_json1_1AlgorithmValidationProfiles = (
   input: Array<AlgorithmValidationProfile>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AlgorithmValidationProfile(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1AlgorithmValidationProfile(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AlgorithmValidationSpecification = (
@@ -10850,7 +10858,11 @@ const serializeAws_json1_1AttributeNames = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutoMLChannel = (
@@ -10891,9 +10903,11 @@ const serializeAws_json1_1AutoMLInputDataConfig = (
   input: Array<AutoMLChannel>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AutoMLChannel(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AutoMLChannel(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutoMLJobCompletionCriteria = (
@@ -11032,9 +11046,11 @@ const serializeAws_json1_1CaptureOptionList = (
   input: Array<CaptureOption>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CaptureOption(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CaptureOption(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CategoricalParameterRange = (
@@ -11072,9 +11088,13 @@ const serializeAws_json1_1CategoricalParameterRanges = (
   input: Array<CategoricalParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CategoricalParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1CategoricalParameterRange(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Channel = (
@@ -11153,9 +11173,11 @@ const serializeAws_json1_1ChannelSpecifications = (
   input: Array<ChannelSpecification>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ChannelSpecification(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ChannelSpecification(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CheckpointConfig = (
@@ -11176,7 +11198,11 @@ const serializeAws_json1_1Cidrs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CognitoMemberDefinition = (
@@ -11219,9 +11245,11 @@ const serializeAws_json1_1CollectionConfigurations = (
   input: Array<CollectionConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CollectionConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CollectionConfiguration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CollectionParameters = (
@@ -11239,14 +11267,22 @@ const serializeAws_json1_1CompressionTypes = (
   input: Array<CompressionType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContainerArguments = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContainerDefinition = (
@@ -11282,30 +11318,44 @@ const serializeAws_json1_1ContainerDefinitionList = (
   input: Array<ContainerDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ContainerDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ContainerDefinition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContainerEntrypoint = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContentClassifiers = (
   input: Array<ContentClassifier | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContentTypes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ContinuousParameterRange = (
@@ -11346,9 +11396,11 @@ const serializeAws_json1_1ContinuousParameterRanges = (
   input: Array<ContinuousParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ContinuousParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ContinuousParameterRange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateAlgorithmInput = (
@@ -12374,7 +12426,11 @@ const serializeAws_json1_1CsvContentTypes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DataCaptureConfig = (
@@ -12514,9 +12570,11 @@ const serializeAws_json1_1DebugRuleConfigurations = (
   input: Array<DebugRuleConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DebugRuleConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DebugRuleConfiguration(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DeleteAlgorithmInput = (
@@ -13074,9 +13132,11 @@ const serializeAws_json1_1DesiredWeightAndCapacityList = (
   input: Array<DesiredWeightAndCapacity>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DesiredWeightAndCapacity(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DesiredWeightAndCapacity(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DisassociateTrialComponentRequest = (
@@ -13182,7 +13242,11 @@ const serializeAws_json1_1FilterList = (
   input: Array<Filter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Filter(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Filter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FlowDefinitionOutputConfig = (
@@ -13203,7 +13267,11 @@ const serializeAws_json1_1FlowDefinitionTaskKeywords = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetSearchSuggestionsRequest = (
@@ -13476,9 +13544,13 @@ const serializeAws_json1_1HyperParameterSpecifications = (
   input: Array<HyperParameterSpecification>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1HyperParameterSpecification(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1HyperParameterSpecification(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1HyperParameterTrainingJobDefinition = (
@@ -13573,9 +13645,13 @@ const serializeAws_json1_1HyperParameterTrainingJobDefinitions = (
   input: Array<HyperParameterTrainingJobDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1HyperParameterTrainingJobDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1HyperParameterTrainingJobDefinition(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1HyperParameterTuningJobConfig = (
@@ -13639,9 +13715,13 @@ const serializeAws_json1_1HyperParameterTuningJobObjectives = (
   input: Array<HyperParameterTuningJobObjective>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1HyperParameterTuningJobObjective(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1HyperParameterTuningJobObjective(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1HyperParameterTuningJobWarmStartConfig = (
@@ -13741,16 +13821,22 @@ const serializeAws_json1_1InputDataConfig = (
   input: Array<Channel>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Channel(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Channel(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InputModes = (
   input: Array<TrainingInputMode | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IntegerParameterRange = (
@@ -13791,16 +13877,22 @@ const serializeAws_json1_1IntegerParameterRanges = (
   input: Array<IntegerParameterRange>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IntegerParameterRange(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1IntegerParameterRange(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1JsonContentTypes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1JupyterServerAppSettings = (
@@ -14962,7 +15054,11 @@ const serializeAws_json1_1ListTrialComponentKey256 = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListTrialComponentsRequest = (
@@ -15106,9 +15202,11 @@ const serializeAws_json1_1MemberDefinitions = (
   input: Array<MemberDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MemberDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MemberDefinition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MetricDefinition = (
@@ -15129,9 +15227,11 @@ const serializeAws_json1_1MetricDefinitionList = (
   input: Array<MetricDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MetricDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MetricDefinition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ModelPackageContainerDefinition = (
@@ -15161,9 +15261,13 @@ const serializeAws_json1_1ModelPackageContainerDefinitionList = (
   input: Array<ModelPackageContainerDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ModelPackageContainerDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ModelPackageContainerDefinition(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ModelPackageValidationProfile = (
@@ -15189,9 +15293,13 @@ const serializeAws_json1_1ModelPackageValidationProfiles = (
   input: Array<ModelPackageValidationProfile>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ModelPackageValidationProfile(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ModelPackageValidationProfile(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ModelPackageValidationSpecification = (
@@ -15305,7 +15413,11 @@ const serializeAws_json1_1MonitoringContainerArguments = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MonitoringEnvironmentMap = (
@@ -15337,9 +15449,11 @@ const serializeAws_json1_1MonitoringInputs = (
   input: Array<MonitoringInput>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MonitoringInput(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MonitoringInput(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MonitoringJobDefinition = (
@@ -15442,9 +15556,11 @@ const serializeAws_json1_1MonitoringOutputs = (
   input: Array<MonitoringOutput>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MonitoringOutput(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MonitoringOutput(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MonitoringResources = (
@@ -15543,9 +15659,11 @@ const serializeAws_json1_1NestedFiltersList = (
   input: Array<NestedFilters>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1NestedFilters(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1NestedFilters(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1NetworkConfig = (
@@ -15569,16 +15687,24 @@ const serializeAws_json1_1NotebookInstanceAcceleratorTypes = (
   input: Array<NotebookInstanceAcceleratorType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1NotebookInstanceLifecycleConfigList = (
   input: Array<NotebookInstanceLifecycleHook>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1NotebookInstanceLifecycleHook(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1NotebookInstanceLifecycleHook(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1NotebookInstanceLifecycleHook = (
@@ -15699,7 +15825,11 @@ const serializeAws_json1_1ParameterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParentHyperParameterTuningJob = (
@@ -15718,9 +15848,13 @@ const serializeAws_json1_1ParentHyperParameterTuningJobs = (
   input: Array<ParentHyperParameterTuningJob>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ParentHyperParameterTuningJob(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ParentHyperParameterTuningJob(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProcessingClusterConfig = (
@@ -15775,9 +15909,11 @@ const serializeAws_json1_1ProcessingInputs = (
   input: Array<ProcessingInput>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProcessingInput(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProcessingInput(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProcessingOutput = (
@@ -15818,9 +15954,11 @@ const serializeAws_json1_1ProcessingOutputs = (
   input: Array<ProcessingOutput>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProcessingOutput(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProcessingOutput(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProcessingResources = (
@@ -15921,9 +16059,11 @@ const serializeAws_json1_1ProductionVariantList = (
   input: Array<ProductionVariant>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProductionVariant(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProductionVariant(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PropertyNameQuery = (
@@ -15955,7 +16095,11 @@ const serializeAws_json1_1RealtimeInferenceInstanceTypes = (
   input: Array<ProductionVariantInstanceType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RenderUiTemplateRequest = (
@@ -16044,7 +16188,11 @@ const serializeAws_json1_1ResponseMIMETypes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RetentionPolicy = (
@@ -16136,9 +16284,11 @@ const serializeAws_json1_1SearchExpressionList = (
   input: Array<SearchExpression>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SearchExpression(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SearchExpression(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SearchRequest = (
@@ -16174,7 +16324,11 @@ const serializeAws_json1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SharingSettings = (
@@ -16223,9 +16377,11 @@ const serializeAws_json1_1SourceAlgorithmList = (
   input: Array<SourceAlgorithm>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SourceAlgorithm(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SourceAlgorithm(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SourceAlgorithmSpecification = (
@@ -16393,7 +16549,11 @@ const serializeAws_json1_1Subnets = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SuggestionQuery = (
@@ -16425,21 +16585,33 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TaskKeywords = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TensorBoardAppSettings = (
@@ -16474,7 +16646,11 @@ const serializeAws_json1_1TrainingInstanceTypes = (
   input: Array<TrainingInstanceType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TrainingJobDefinition = (
@@ -16624,7 +16800,11 @@ const serializeAws_json1_1TransformInstanceTypes = (
   input: Array<TransformInstanceType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TransformJobDefinition = (
@@ -17243,7 +17423,11 @@ const serializeAws_json1_1VpcSecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AddTagsOutput = (
diff --git a/clients/client-savingsplans/protocols/Aws_restJson1_1.ts b/clients/client-savingsplans/protocols/Aws_restJson1_1.ts
index 1e2973ba4506f..e555fbd0fea08 100644
--- a/clients/client-savingsplans/protocols/Aws_restJson1_1.ts
+++ b/clients/client-savingsplans/protocols/Aws_restJson1_1.ts
@@ -1153,28 +1153,44 @@ const serializeAws_restJson1_1CurrencyList = (
   input: Array<CurrencyCode | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DurationsList = (
   input: Array<number>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1FilterValuesList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanDescriptionsList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanOfferingFilterElement = (
@@ -1198,9 +1214,13 @@ const serializeAws_restJson1_1SavingsPlanOfferingFiltersList = (
   input: Array<SavingsPlanOfferingFilterElement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SavingsPlanOfferingFilterElement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1SavingsPlanOfferingFilterElement(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanOfferingRateFilterElement = (
@@ -1224,93 +1244,148 @@ const serializeAws_restJson1_1SavingsPlanOfferingRateFiltersList = (
   input: Array<SavingsPlanOfferingRateFilterElement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SavingsPlanOfferingRateFilterElement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1SavingsPlanOfferingRateFilterElement(
+        entry,
+        context
+      )
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1UUIDs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanOperationList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanPaymentOptionList = (
   input: Array<SavingsPlanPaymentOption | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanProductTypeList = (
   input: Array<SavingsPlanProductType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanRateOperationList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanRateServiceCodeList = (
   input: Array<SavingsPlanRateServiceCode | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanRateUsageTypeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanServiceCodeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanTypeList = (
   input: Array<SavingsPlanType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanUsageTypeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ListOfStrings = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanFilter = (
@@ -1334,16 +1409,22 @@ const serializeAws_restJson1_1SavingsPlanFilterList = (
   input: Array<SavingsPlanFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SavingsPlanFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SavingsPlanFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanRateFilter = (
@@ -1367,23 +1448,35 @@ const serializeAws_restJson1_1SavingsPlanRateFilterList = (
   input: Array<SavingsPlanRateFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SavingsPlanRateFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1SavingsPlanRateFilter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SavingsPlanStateList = (
   input: Array<SavingsPlanState | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
diff --git a/clients/client-schemas/protocols/Aws_restJson1_1.ts b/clients/client-schemas/protocols/Aws_restJson1_1.ts
index 030754d88a01d..6318bbd171f2e 100644
--- a/clients/client-schemas/protocols/Aws_restJson1_1.ts
+++ b/clients/client-schemas/protocols/Aws_restJson1_1.ts
@@ -4723,7 +4723,11 @@ const serializeAws_restJson1_1__listOfGetDiscoveredSchemaVersionItemInput = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1DiscovererSummary = (
diff --git a/clients/client-secrets-manager/protocols/Aws_json1_1.ts b/clients/client-secrets-manager/protocols/Aws_json1_1.ts
index a2641c22d88a6..4798b392947ac 100644
--- a/clients/client-secrets-manager/protocols/Aws_json1_1.ts
+++ b/clients/client-secrets-manager/protocols/Aws_json1_1.ts
@@ -2551,7 +2551,11 @@ const serializeAws_json1_1SecretVersionStagesType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -2569,14 +2573,22 @@ const serializeAws_json1_1TagKeyListType = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagListType = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
diff --git a/clients/client-securityhub/protocols/Aws_restJson1_1.ts b/clients/client-securityhub/protocols/Aws_restJson1_1.ts
index df3676d2f31d5..1318427d2f312 100644
--- a/clients/client-securityhub/protocols/Aws_restJson1_1.ts
+++ b/clients/client-securityhub/protocols/Aws_restJson1_1.ts
@@ -5350,23 +5350,33 @@ const serializeAws_restJson1_1AccountDetailsList = (
   input: Array<AccountDetails>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AccountDetails(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AccountDetails(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AccountIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ArnList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AvailabilityZone = (
@@ -5387,9 +5397,11 @@ const serializeAws_restJson1_1AvailabilityZones = (
   input: Array<AvailabilityZone>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AvailabilityZone(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AvailabilityZone(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AwsCloudFrontDistributionDetails = (
@@ -5472,9 +5484,16 @@ const serializeAws_restJson1_1AwsCloudFrontDistributionOriginItemList = (
   input: Array<AwsCloudFrontDistributionOriginItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AwsCloudFrontDistributionOriginItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1AwsCloudFrontDistributionOriginItem(
+        entry,
+        context
+      )
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AwsCloudFrontDistributionOrigins = (
@@ -5832,9 +5851,13 @@ const serializeAws_restJson1_1AwsLambdaFunctionLayerList = (
   input: Array<AwsLambdaFunctionLayer>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AwsLambdaFunctionLayer(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1AwsLambdaFunctionLayer(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AwsLambdaFunctionTracingConfig = (
@@ -6587,9 +6610,11 @@ const serializeAws_restJson1_1AwsSecurityFindingList = (
   input: Array<AwsSecurityFinding>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AwsSecurityFinding(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1AwsSecurityFinding(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AwsSnsTopicDetails = (
@@ -6635,9 +6660,13 @@ const serializeAws_restJson1_1AwsSnsTopicSubscriptionList = (
   input: Array<AwsSnsTopicSubscription>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1AwsSnsTopicSubscription(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1AwsSnsTopicSubscription(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1AwsSqsQueueDetails = (
@@ -6716,9 +6745,11 @@ const serializeAws_restJson1_1DateFilterList = (
   input: Array<DateFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DateFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1DateFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1DateRange = (
@@ -6761,9 +6792,11 @@ const serializeAws_restJson1_1IpFilterList = (
   input: Array<IpFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1IpFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1IpFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1KeywordFilter = (
@@ -6781,9 +6814,11 @@ const serializeAws_restJson1_1KeywordFilterList = (
   input: Array<KeywordFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1KeywordFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1KeywordFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1LoadBalancerState = (
@@ -6824,9 +6859,11 @@ const serializeAws_restJson1_1MalwareList = (
   input: Array<Malware>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Malware(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Malware(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1MapFilter = (
@@ -6850,9 +6887,11 @@ const serializeAws_restJson1_1MapFilterList = (
   input: Array<MapFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MapFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1MapFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Network = (
@@ -6900,7 +6939,11 @@ const serializeAws_restJson1_1NonEmptyStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Note = (
@@ -6955,9 +6998,11 @@ const serializeAws_restJson1_1NumberFilterList = (
   input: Array<NumberFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1NumberFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1NumberFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1ProcessDetails = (
@@ -7018,9 +7063,11 @@ const serializeAws_restJson1_1RelatedFindingList = (
   input: Array<RelatedFinding>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1RelatedFinding(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1RelatedFinding(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Remediation = (
@@ -7160,16 +7207,22 @@ const serializeAws_restJson1_1ResourceList = (
   input: Array<Resource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Resource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Resource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SecurityGroups = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Severity = (
@@ -7190,9 +7243,11 @@ const serializeAws_restJson1_1SortCriteria = (
   input: Array<SortCriterion>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SortCriterion(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SortCriterion(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SortCriterion = (
@@ -7224,7 +7279,11 @@ const serializeAws_restJson1_1StandardsSubscriptionArns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StandardsSubscriptionRequest = (
@@ -7250,9 +7309,13 @@ const serializeAws_restJson1_1StandardsSubscriptionRequests = (
   input: Array<StandardsSubscriptionRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1StandardsSubscriptionRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1StandardsSubscriptionRequest(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StringFilter = (
@@ -7273,16 +7336,22 @@ const serializeAws_restJson1_1StringFilterList = (
   input: Array<StringFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1StringFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1StringFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TagMap = (
@@ -7326,16 +7395,22 @@ const serializeAws_restJson1_1ThreatIntelIndicatorList = (
   input: Array<ThreatIntelIndicator>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ThreatIntelIndicator(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ThreatIntelIndicator(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TypeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ActionTarget = (
diff --git a/clients/client-serverlessapplicationrepository/protocols/Aws_restJson1_1.ts b/clients/client-serverlessapplicationrepository/protocols/Aws_restJson1_1.ts
index 5164dca3bcffa..099f322d8c771 100644
--- a/clients/client-serverlessapplicationrepository/protocols/Aws_restJson1_1.ts
+++ b/clients/client-serverlessapplicationrepository/protocols/Aws_restJson1_1.ts
@@ -2464,43 +2464,57 @@ const serializeAws_restJson1_1__listOfApplicationPolicyStatement = (
   input: Array<ApplicationPolicyStatement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ApplicationPolicyStatement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1ApplicationPolicyStatement(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfParameterValue = (
   input: Array<ParameterValue>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1ParameterValue(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1ParameterValue(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfRollbackTrigger = (
   input: Array<RollbackTrigger>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1RollbackTrigger(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1RollbackTrigger(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOfTag = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1__listOf__string = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1ApplicationDependencySummary = (
diff --git a/clients/client-service-catalog/protocols/Aws_json1_1.ts b/clients/client-service-catalog/protocols/Aws_json1_1.ts
index e50dcb994aa17..0dd5cf68c4b52 100644
--- a/clients/client-service-catalog/protocols/Aws_json1_1.ts
+++ b/clients/client-service-catalog/protocols/Aws_json1_1.ts
@@ -8380,7 +8380,11 @@ const serializeAws_json1_1AddTags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociateBudgetWithResourceInput = (
@@ -8499,7 +8503,11 @@ const serializeAws_json1_1CopyOptions = (
   input: Array<CopyOption | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CopyProductInput = (
@@ -9274,7 +9282,11 @@ const serializeAws_json1_1ExecutionParameterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetAWSOrganizationsAccessStatusInput = (
@@ -9631,7 +9643,11 @@ const serializeAws_json1_1NotificationArns = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OrganizationNode = (
@@ -9652,7 +9668,11 @@ const serializeAws_json1_1ProductViewFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProductViewFilters = (
@@ -9752,7 +9772,11 @@ const serializeAws_json1_1ProvisionedProductViewFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProvisioningArtifactInfo = (
@@ -9810,9 +9834,11 @@ const serializeAws_json1_1ProvisioningParameters = (
   input: Array<ProvisioningParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ProvisioningParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ProvisioningParameter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ProvisioningPreferences = (
@@ -10011,9 +10037,11 @@ const serializeAws_json1_1ServiceActionAssociations = (
   input: Array<ServiceActionAssociation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServiceActionAssociation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ServiceActionAssociation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServiceActionDefinitionMap = (
@@ -10031,9 +10059,16 @@ const serializeAws_json1_1SourceProvisioningArtifactProperties = (
   input: Array<{ [key: string]: string }>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SourceProvisioningArtifactPropertiesMap(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1SourceProvisioningArtifactPropertiesMap(
+        entry,
+        context
+      )
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SourceProvisioningArtifactPropertiesMap = (
@@ -10051,14 +10086,22 @@ const serializeAws_json1_1StackSetAccounts = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StackSetRegions = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -10076,14 +10119,22 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TerminateProvisionedProductInput = (
@@ -10337,9 +10388,13 @@ const serializeAws_json1_1UpdateProvisioningParameters = (
   input: Array<UpdateProvisioningParameter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1UpdateProvisioningParameter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1UpdateProvisioningParameter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateProvisioningPreferences = (
diff --git a/clients/client-servicediscovery/protocols/Aws_json1_1.ts b/clients/client-servicediscovery/protocols/Aws_json1_1.ts
index 1cb73ac61ea16..bb516ba1e6126 100644
--- a/clients/client-servicediscovery/protocols/Aws_json1_1.ts
+++ b/clients/client-servicediscovery/protocols/Aws_json1_1.ts
@@ -2482,16 +2482,22 @@ const serializeAws_json1_1DnsRecordList = (
   input: Array<DnsRecord>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DnsRecord(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DnsRecord(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetInstanceRequest = (
@@ -2596,7 +2602,11 @@ const serializeAws_json1_1InstanceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListInstancesRequest = (
@@ -2700,9 +2710,11 @@ const serializeAws_json1_1NamespaceFilters = (
   input: Array<NamespaceFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1NamespaceFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1NamespaceFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OperationFilter = (
@@ -2729,9 +2741,11 @@ const serializeAws_json1_1OperationFilters = (
   input: Array<OperationFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OperationFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OperationFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegisterInstanceRequest = (
@@ -2807,9 +2821,11 @@ const serializeAws_json1_1ServiceFilters = (
   input: Array<ServiceFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServiceFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ServiceFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateInstanceCustomHealthStatusRequest = (
diff --git a/clients/client-ses/protocols/Aws_query.ts b/clients/client-ses/protocols/Aws_query.ts
index c6e12b4df8e07..019d664fcdf9e 100644
--- a/clients/client-ses/protocols/Aws_query.ts
+++ b/clients/client-ses/protocols/Aws_query.ts
@@ -7140,10 +7140,10 @@ const serializeAws_queryAddressList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7222,7 +7222,7 @@ const serializeAws_queryBouncedRecipientInfoList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryBouncedRecipientInfo(
       entry,
       context
@@ -7231,7 +7231,7 @@ const serializeAws_queryBouncedRecipientInfoList = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7272,7 +7272,7 @@ const serializeAws_queryBulkEmailDestinationList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryBulkEmailDestination(
       entry,
       context
@@ -7281,7 +7281,7 @@ const serializeAws_queryBulkEmailDestinationList = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7340,7 +7340,7 @@ const serializeAws_queryCloudWatchDimensionConfigurations = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryCloudWatchDimensionConfiguration(
       entry,
       context
@@ -7349,7 +7349,7 @@ const serializeAws_queryCloudWatchDimensionConfigurations = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7370,10 +7370,10 @@ const serializeAws_queryConfigurationSetAttributeList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7835,10 +7835,10 @@ const serializeAws_queryEventTypes = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7862,13 +7862,13 @@ const serializeAws_queryExtensionFieldList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryExtensionField(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -7993,10 +7993,10 @@ const serializeAws_queryIdentityList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8172,13 +8172,13 @@ const serializeAws_queryMessageTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryMessageTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8188,10 +8188,10 @@ const serializeAws_queryPolicyNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8322,13 +8322,13 @@ const serializeAws_queryReceiptActionsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryReceiptAction(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8413,10 +8413,10 @@ const serializeAws_queryReceiptRuleNamesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -8462,10 +8462,10 @@ const serializeAws_queryRecipientsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -9866,9 +9866,9 @@ const deserializeAws_queryDkimAttributes = (
   context: __SerdeContext
 ): { [key: string]: IdentityDkimAttributes } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = deserializeAws_queryIdentityDkimAttributes(
-      output[key],
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = deserializeAws_queryIdentityDkimAttributes(
+      pair["value"],
       context
     );
   });
@@ -10885,9 +10885,11 @@ const deserializeAws_queryMailFromDomainAttributes = (
   context: __SerdeContext
 ): { [key: string]: IdentityMailFromDomainAttributes } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = deserializeAws_queryIdentityMailFromDomainAttributes(
-      output[key],
+  output.forEach((pair: any) => {
+    mapParams[
+      pair["key"]
+    ] = deserializeAws_queryIdentityMailFromDomainAttributes(
+      pair["value"],
       context
     );
   });
@@ -10945,9 +10947,9 @@ const deserializeAws_queryNotificationAttributes = (
   context: __SerdeContext
 ): { [key: string]: IdentityNotificationAttributes } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = deserializeAws_queryIdentityNotificationAttributes(
-      output[key],
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = deserializeAws_queryIdentityNotificationAttributes(
+      pair["value"],
       context
     );
   });
@@ -10959,8 +10961,8 @@ const deserializeAws_queryPolicyMap = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
@@ -11756,9 +11758,9 @@ const deserializeAws_queryVerificationAttributes = (
   context: __SerdeContext
 ): { [key: string]: IdentityVerificationAttributes } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = deserializeAws_queryIdentityVerificationAttributes(
-      output[key],
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = deserializeAws_queryIdentityVerificationAttributes(
+      pair["value"],
       context
     );
   });
diff --git a/clients/client-sesv2/protocols/Aws_restJson1_1.ts b/clients/client-sesv2/protocols/Aws_restJson1_1.ts
index b973303b238b9..dfa1f2b956dbe 100644
--- a/clients/client-sesv2/protocols/Aws_restJson1_1.ts
+++ b/clients/client-sesv2/protocols/Aws_restJson1_1.ts
@@ -6323,7 +6323,11 @@ const serializeAws_restJson1_1SuppressionListReasons = (
   input: Array<SuppressionListReason | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SuppressionOptions = (
@@ -6360,9 +6364,11 @@ const serializeAws_restJson1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1Tag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Body = (
@@ -6416,9 +6422,13 @@ const serializeAws_restJson1_1CloudWatchDimensionConfigurations = (
   input: Array<CloudWatchDimensionConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1CloudWatchDimensionConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1CloudWatchDimensionConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1Content = (
@@ -6517,16 +6527,24 @@ const serializeAws_restJson1_1DomainDeliverabilityTrackingOptions = (
   input: Array<DomainDeliverabilityTrackingOption>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1DomainDeliverabilityTrackingOption(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1DomainDeliverabilityTrackingOption(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1EmailAddressList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1EmailContent = (
@@ -6603,7 +6621,11 @@ const serializeAws_restJson1_1EventTypes = (
   input: Array<EventType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1InboxPlacementTrackingOption = (
@@ -6627,7 +6649,11 @@ const serializeAws_restJson1_1IspNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1KinesisFirehoseDestination = (
@@ -6679,9 +6705,11 @@ const serializeAws_restJson1_1MessageTagList = (
   input: Array<MessageTag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1MessageTag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1MessageTag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1PinpointDestination = (
diff --git a/clients/client-sfn/protocols/Aws_json1_0.ts b/clients/client-sfn/protocols/Aws_json1_0.ts
index fa9963f943ff0..47b33555b15ed 100644
--- a/clients/client-sfn/protocols/Aws_json1_0.ts
+++ b/clients/client-sfn/protocols/Aws_json1_0.ts
@@ -2696,9 +2696,11 @@ const serializeAws_json1_0LogDestinationList = (
   input: Array<LogDestination>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0LogDestination(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0LogDestination(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0LoggingConfiguration = (
@@ -3016,14 +3018,22 @@ const serializeAws_json1_0TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_0Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0TagResourceInput = (
diff --git a/clients/client-shield/protocols/Aws_json1_1.ts b/clients/client-shield/protocols/Aws_json1_1.ts
index 3c672111d97f5..8287d9c6f4454 100644
--- a/clients/client-shield/protocols/Aws_json1_1.ts
+++ b/clients/client-shield/protocols/Aws_json1_1.ts
@@ -2363,9 +2363,11 @@ const serializeAws_json1_1EmergencyContactList = (
   input: Array<EmergencyContact>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EmergencyContact(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EmergencyContact(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetSubscriptionStateRequest = (
@@ -2426,7 +2428,11 @@ const serializeAws_json1_1ResourceArnFilterList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TimeRange = (
diff --git a/clients/client-sms/protocols/Aws_json1_1.ts b/clients/client-sms/protocols/Aws_json1_1.ts
index 93dac57633e86..20617fdb92148 100644
--- a/clients/client-sms/protocols/Aws_json1_1.ts
+++ b/clients/client-sms/protocols/Aws_json1_1.ts
@@ -3583,7 +3583,11 @@ const serializeAws_json1_1AppIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateAppRequest = (
@@ -4016,9 +4020,13 @@ const serializeAws_json1_1ServerGroupLaunchConfigurations = (
   input: Array<ServerGroupLaunchConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServerGroupLaunchConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ServerGroupLaunchConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServerGroupReplicationConfiguration = (
@@ -4044,18 +4052,24 @@ const serializeAws_json1_1ServerGroupReplicationConfigurations = (
   input: Array<ServerGroupReplicationConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServerGroupReplicationConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ServerGroupReplicationConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServerGroups = (
   input: Array<ServerGroup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServerGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ServerGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServerLaunchConfiguration = (
@@ -4100,16 +4114,24 @@ const serializeAws_json1_1ServerLaunchConfigurations = (
   input: Array<ServerLaunchConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServerLaunchConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ServerLaunchConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServerList = (
   input: Array<Server>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Server(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Server(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServerReplicationConfiguration = (
@@ -4135,9 +4157,13 @@ const serializeAws_json1_1ServerReplicationConfigurations = (
   input: Array<ServerReplicationConfiguration>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ServerReplicationConfiguration(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ServerReplicationConfiguration(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ServerReplicationParameters = (
@@ -4220,7 +4246,11 @@ const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TerminateAppRequest = (
@@ -4358,9 +4388,11 @@ const serializeAws_json1_1VmServerAddressList = (
   input: Array<VmServerAddress>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1VmServerAddress(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1VmServerAddress(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AppSummary = (
diff --git a/clients/client-snowball/protocols/Aws_json1_1.ts b/clients/client-snowball/protocols/Aws_json1_1.ts
index ce5affb9b2ef1..fb8b091517453 100644
--- a/clients/client-snowball/protocols/Aws_json1_1.ts
+++ b/clients/client-snowball/protocols/Aws_json1_1.ts
@@ -2206,9 +2206,11 @@ const serializeAws_json1_1Ec2AmiResourceList = (
   input: Array<Ec2AmiResource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Ec2AmiResource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Ec2AmiResource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1EventTriggerDefinition = (
@@ -2226,9 +2228,11 @@ const serializeAws_json1_1EventTriggerDefinitionList = (
   input: Array<EventTriggerDefinition>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1EventTriggerDefinition(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1EventTriggerDefinition(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetJobManifestRequest = (
@@ -2302,7 +2306,11 @@ const serializeAws_json1_1JobStateList = (
   input: Array<JobState | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1KeyRange = (
@@ -2342,9 +2350,11 @@ const serializeAws_json1_1LambdaResourceList = (
   input: Array<LambdaResource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1LambdaResource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1LambdaResource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListClusterJobsRequest = (
@@ -2447,9 +2457,11 @@ const serializeAws_json1_1S3ResourceList = (
   input: Array<S3Resource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1S3Resource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1S3Resource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateClusterRequest = (
diff --git a/clients/client-sns/protocols/Aws_query.ts b/clients/client-sns/protocols/Aws_query.ts
index a45aecdb09750..c6eccf423400f 100644
--- a/clients/client-sns/protocols/Aws_query.ts
+++ b/clients/client-sns/protocols/Aws_query.ts
@@ -4467,10 +4467,10 @@ const serializeAws_queryActionsList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4621,10 +4621,10 @@ const serializeAws_queryDelegatesList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -4765,10 +4765,10 @@ const serializeAws_queryListString = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5086,10 +5086,10 @@ const serializeAws_queryTagKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5099,13 +5099,13 @@ const serializeAws_queryTagList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -5829,8 +5829,8 @@ const deserializeAws_queryMapStringToString = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
@@ -6012,8 +6012,8 @@ const deserializeAws_querySubscriptionAttributesMap = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
@@ -6136,8 +6136,8 @@ const deserializeAws_queryTopicAttributesMap = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["key"]] = pair["value"];
   });
   return mapParams;
 };
diff --git a/clients/client-sqs/protocols/Aws_query.ts b/clients/client-sqs/protocols/Aws_query.ts
index 92cf0af1b32f5..e3d05d06db62b 100644
--- a/clients/client-sqs/protocols/Aws_query.ts
+++ b/clients/client-sqs/protocols/Aws_query.ts
@@ -2035,10 +2035,10 @@ const serializeAws_queryAWSAccountIdList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2048,10 +2048,10 @@ const serializeAws_queryActionNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2095,10 +2095,10 @@ const serializeAws_queryAttributeNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2108,10 +2108,10 @@ const serializeAws_queryBinaryList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`BinaryListValue.${counter}`] = context.base64Encoder(entry);
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2161,7 +2161,7 @@ const serializeAws_queryChangeMessageVisibilityBatchRequestEntryList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryChangeMessageVisibilityBatchRequestEntry(
       entry,
       context
@@ -2170,7 +2170,7 @@ const serializeAws_queryChangeMessageVisibilityBatchRequestEntryList = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2262,7 +2262,7 @@ const serializeAws_queryDeleteMessageBatchRequestEntryList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryDeleteMessageBatchRequestEntry(
       entry,
       context
@@ -2271,7 +2271,7 @@ const serializeAws_queryDeleteMessageBatchRequestEntryList = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2374,10 +2374,10 @@ const serializeAws_queryMessageAttributeNameList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2651,7 +2651,7 @@ const serializeAws_querySendMessageBatchRequestEntryList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_querySendMessageBatchRequestEntry(
       entry,
       context
@@ -2660,7 +2660,7 @@ const serializeAws_querySendMessageBatchRequestEntryList = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2736,10 +2736,10 @@ const serializeAws_queryStringList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`StringListValue.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -2749,10 +2749,10 @@ const serializeAws_queryTagKeyList = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -3266,9 +3266,9 @@ const deserializeAws_queryMessageBodyAttributeMap = (
   context: __SerdeContext
 ): { [key: string]: MessageAttributeValue } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = deserializeAws_queryMessageAttributeValue(
-      output[key],
+  output.forEach((pair: any) => {
+    mapParams[pair["Name"]] = deserializeAws_queryMessageAttributeValue(
+      pair["Value"],
       context
     );
   });
@@ -3299,8 +3299,8 @@ const deserializeAws_queryMessageSystemAttributeMap = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["Name"]] = pair["Value"];
   });
   return mapParams;
 };
@@ -3330,8 +3330,8 @@ const deserializeAws_queryQueueAttributeMap = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["Name"]] = pair["Value"];
   });
   return mapParams;
 };
@@ -3529,8 +3529,8 @@ const deserializeAws_queryTagMap = (
   context: __SerdeContext
 ): { [key: string]: string } => {
   const mapParams: any = {};
-  Object.keys(output).forEach(key => {
-    mapParams[key] = output[key];
+  output.forEach((pair: any) => {
+    mapParams[pair["Key"]] = pair["Value"];
   });
   return mapParams;
 };
diff --git a/clients/client-ssm/protocols/Aws_json1_1.ts b/clients/client-ssm/protocols/Aws_json1_1.ts
index 1aebdc921c6a8..99a2aedde9211 100644
--- a/clients/client-ssm/protocols/Aws_json1_1.ts
+++ b/clients/client-ssm/protocols/Aws_json1_1.ts
@@ -15562,14 +15562,22 @@ const serializeAws_json1_1AccountIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Accounts = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AddTagsToResourceRequest = (
@@ -15610,9 +15618,13 @@ const serializeAws_json1_1AssociationExecutionFilterList = (
   input: Array<AssociationExecutionFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AssociationExecutionFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1AssociationExecutionFilter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociationExecutionTargetsFilter = (
@@ -15633,9 +15645,13 @@ const serializeAws_json1_1AssociationExecutionTargetsFilterList = (
   input: Array<AssociationExecutionTargetsFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AssociationExecutionTargetsFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1AssociationExecutionTargetsFilter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociationFilter = (
@@ -15656,16 +15672,22 @@ const serializeAws_json1_1AssociationFilterList = (
   input: Array<AssociationFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AssociationFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AssociationFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociationIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AssociationStatus = (
@@ -15712,16 +15734,22 @@ const serializeAws_json1_1AttachmentsSourceList = (
   input: Array<AttachmentsSource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AttachmentsSource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1AttachmentsSource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AttachmentsSourceValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutomationExecutionFilter = (
@@ -15747,16 +15775,24 @@ const serializeAws_json1_1AutomationExecutionFilterList = (
   input: Array<AutomationExecutionFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1AutomationExecutionFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1AutomationExecutionFilter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutomationExecutionFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AutomationParameterMap = (
@@ -15777,14 +15813,22 @@ const serializeAws_json1_1AutomationParameterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CalendarNameOrARNList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CancelCommandRequest = (
@@ -15847,9 +15891,11 @@ const serializeAws_json1_1CommandFilterList = (
   input: Array<CommandFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CommandFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1CommandFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ComplianceExecutionSummary = (
@@ -15912,23 +15958,33 @@ const serializeAws_json1_1ComplianceItemEntryList = (
   input: Array<ComplianceItemEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ComplianceItemEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ComplianceItemEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ComplianceResourceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ComplianceResourceTypeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ComplianceStringFilter = (
@@ -15955,16 +16011,22 @@ const serializeAws_json1_1ComplianceStringFilterList = (
   input: Array<ComplianceStringFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ComplianceStringFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ComplianceStringFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ComplianceStringFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateActivationRequest = (
@@ -16015,9 +16077,13 @@ const serializeAws_json1_1CreateAssociationBatchRequestEntries = (
   input: Array<CreateAssociationBatchRequestEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1CreateAssociationBatchRequestEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1CreateAssociationBatchRequestEntry(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateAssociationBatchRequestEntry = (
@@ -16562,9 +16628,13 @@ const serializeAws_json1_1DescribeActivationsFilterList = (
   input: Array<DescribeActivationsFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DescribeActivationsFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1DescribeActivationsFilter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DescribeActivationsRequest = (
@@ -17269,9 +17339,11 @@ const serializeAws_json1_1DocumentFilterList = (
   input: Array<DocumentFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DocumentFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DocumentFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentKeyValuesFilter = (
@@ -17295,16 +17367,22 @@ const serializeAws_json1_1DocumentKeyValuesFilterList = (
   input: Array<DocumentKeyValuesFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DocumentKeyValuesFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DocumentKeyValuesFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentKeyValuesFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DocumentRequires = (
@@ -17325,9 +17403,11 @@ const serializeAws_json1_1DocumentRequiresList = (
   input: Array<DocumentRequires>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1DocumentRequires(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1DocumentRequires(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetAutomationExecutionRequest = (
@@ -17735,7 +17815,11 @@ const serializeAws_json1_1InstanceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceInformationFilter = (
@@ -17761,16 +17845,24 @@ const serializeAws_json1_1InstanceInformationFilterList = (
   input: Array<InstanceInformationFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InstanceInformationFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1InstanceInformationFilter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceInformationFilterValueSet = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstanceInformationStringFilter = (
@@ -17796,9 +17888,13 @@ const serializeAws_json1_1InstanceInformationStringFilterList = (
   input: Array<InstanceInformationStringFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InstanceInformationStringFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1InstanceInformationStringFilter(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstancePatchStateFilter = (
@@ -17825,16 +17921,22 @@ const serializeAws_json1_1InstancePatchStateFilterList = (
   input: Array<InstancePatchStateFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InstancePatchStateFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InstancePatchStateFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InstancePatchStateFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InventoryAggregator = (
@@ -17864,9 +17966,11 @@ const serializeAws_json1_1InventoryAggregatorList = (
   input: Array<InventoryAggregator>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InventoryAggregator(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InventoryAggregator(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InventoryFilter = (
@@ -17893,16 +17997,22 @@ const serializeAws_json1_1InventoryFilterList = (
   input: Array<InventoryFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InventoryFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InventoryFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InventoryFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InventoryGroup = (
@@ -17926,9 +18036,11 @@ const serializeAws_json1_1InventoryGroupList = (
   input: Array<InventoryGroup>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InventoryGroup(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InventoryGroup(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InventoryItem = (
@@ -17989,25 +18101,33 @@ const serializeAws_json1_1InventoryItemEntryList = (
   input: Array<{ [key: string]: string }>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InventoryItemEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InventoryItemEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1InventoryItemList = (
   input: Array<InventoryItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1InventoryItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1InventoryItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1KeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LabelParameterVersionRequest = (
@@ -18353,16 +18473,22 @@ const serializeAws_json1_1MaintenanceWindowFilterList = (
   input: Array<MaintenanceWindowFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1MaintenanceWindowFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1MaintenanceWindowFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MaintenanceWindowFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MaintenanceWindowLambdaParameters = (
@@ -18508,7 +18634,11 @@ const serializeAws_json1_1MaintenanceWindowTaskParameterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1MaintenanceWindowTaskParameters = (
@@ -18582,7 +18712,11 @@ const serializeAws_json1_1NotificationEventList = (
   input: Array<NotificationEvent | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpsAggregator = (
@@ -18624,9 +18758,11 @@ const serializeAws_json1_1OpsAggregatorList = (
   input: Array<OpsAggregator>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OpsAggregator(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OpsAggregator(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpsAggregatorValueMap = (
@@ -18664,16 +18800,22 @@ const serializeAws_json1_1OpsFilterList = (
   input: Array<OpsFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OpsFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OpsFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpsFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpsItemDataValue = (
@@ -18714,16 +18856,22 @@ const serializeAws_json1_1OpsItemFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpsItemFilters = (
   input: Array<OpsItemFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OpsItemFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OpsItemFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpsItemNotification = (
@@ -18741,9 +18889,11 @@ const serializeAws_json1_1OpsItemNotifications = (
   input: Array<OpsItemNotification>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OpsItemNotification(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OpsItemNotification(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpsItemOperationalData = (
@@ -18761,7 +18911,11 @@ const serializeAws_json1_1OpsItemOpsDataKeysList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1OpsResultAttribute = (
@@ -18779,23 +18933,33 @@ const serializeAws_json1_1OpsResultAttributeList = (
   input: Array<OpsResultAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1OpsResultAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1OpsResultAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterLabelList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterStringFilter = (
@@ -18822,23 +18986,33 @@ const serializeAws_json1_1ParameterStringFilterList = (
   input: Array<ParameterStringFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ParameterStringFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ParameterStringFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterStringFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParameterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Parameters = (
@@ -18876,16 +19050,22 @@ const serializeAws_json1_1ParametersFilterList = (
   input: Array<ParametersFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ParametersFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ParametersFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ParametersFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PatchFilter = (
@@ -18923,23 +19103,33 @@ const serializeAws_json1_1PatchFilterList = (
   input: Array<PatchFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PatchFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PatchFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PatchFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PatchIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PatchOrchestratorFilter = (
@@ -18963,16 +19153,22 @@ const serializeAws_json1_1PatchOrchestratorFilterList = (
   input: Array<PatchOrchestratorFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PatchOrchestratorFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PatchOrchestratorFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PatchOrchestratorFilterValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PatchRule = (
@@ -19016,9 +19212,11 @@ const serializeAws_json1_1PatchRuleList = (
   input: Array<PatchRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PatchRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PatchRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PatchSource = (
@@ -19045,16 +19243,22 @@ const serializeAws_json1_1PatchSourceList = (
   input: Array<PatchSource>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1PatchSource(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1PatchSource(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PatchSourceProductList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutComplianceItemsRequest = (
@@ -19150,7 +19354,11 @@ const serializeAws_json1_1Regions = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegisterDefaultPatchBaselineRequest = (
@@ -19291,9 +19499,11 @@ const serializeAws_json1_1RelatedOpsItems = (
   input: Array<RelatedOpsItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RelatedOpsItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RelatedOpsItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RemoveTagsFromResourceRequest = (
@@ -19358,9 +19568,13 @@ const serializeAws_json1_1ResourceDataSyncOrganizationalUnitList = (
   input: Array<ResourceDataSyncOrganizationalUnit>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResourceDataSyncOrganizationalUnit(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1ResourceDataSyncOrganizationalUnit(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResourceDataSyncS3Destination = (
@@ -19420,7 +19634,11 @@ const serializeAws_json1_1ResourceDataSyncSourceRegionList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResultAttribute = (
@@ -19438,9 +19656,11 @@ const serializeAws_json1_1ResultAttributeList = (
   input: Array<ResultAttribute>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ResultAttribute(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ResultAttribute(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ResumeSessionRequest = (
@@ -19582,16 +19802,22 @@ const serializeAws_json1_1SessionFilterList = (
   input: Array<SessionFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SessionFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SessionFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SessionManagerParameterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SessionManagerParameters = (
@@ -19716,16 +19942,22 @@ const serializeAws_json1_1StepExecutionFilterList = (
   input: Array<StepExecutionFilter>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1StepExecutionFilter(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1StepExecutionFilter(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StepExecutionFilterValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StopAutomationExecutionRequest = (
@@ -19746,7 +19978,11 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -19764,7 +20000,11 @@ const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Target = (
@@ -19815,9 +20055,11 @@ const serializeAws_json1_1TargetLocations = (
   input: Array<TargetLocation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TargetLocation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TargetLocation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetMap = (
@@ -19838,30 +20080,44 @@ const serializeAws_json1_1TargetMapValueList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetMaps = (
   input: Array<{ [key: string]: Array<string> }>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TargetMap(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TargetMap(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TargetValues = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Targets = (
   input: Array<Target>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Target(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Target(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TerminateSessionRequest = (
diff --git a/clients/client-sso-oidc/protocols/Aws_restJson1_1.ts b/clients/client-sso-oidc/protocols/Aws_restJson1_1.ts
index 278abe006326b..8915a9565dea6 100644
--- a/clients/client-sso-oidc/protocols/Aws_restJson1_1.ts
+++ b/clients/client-sso-oidc/protocols/Aws_restJson1_1.ts
@@ -806,7 +806,11 @@ const serializeAws_restJson1_1Scopes = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeMetadata = (output: __HttpResponse): __ResponseMetadata => ({
diff --git a/clients/client-storage-gateway/protocols/Aws_json1_1.ts b/clients/client-storage-gateway/protocols/Aws_json1_1.ts
index adf419814ab48..4cee07325282b 100644
--- a/clients/client-storage-gateway/protocols/Aws_json1_1.ts
+++ b/clients/client-storage-gateway/protocols/Aws_json1_1.ts
@@ -7142,7 +7142,11 @@ const serializeAws_json1_1DiskIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListGatewaysInput = (
@@ -7310,7 +7314,11 @@ const serializeAws_json1_1VolumeARNs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AddCacheInput = (
@@ -7973,35 +7981,55 @@ const serializeAws_json1_1FileShareARNList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FileShareClientList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FileShareUserList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FolderList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Hosts = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1JoinDomainInput = (
@@ -8259,21 +8287,33 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TapeARNs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1UpdateGatewayInformationInput = (
@@ -8430,7 +8470,11 @@ const serializeAws_json1_1VTLDeviceARNs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1ActivateGatewayOutput = (
diff --git a/clients/client-sts/protocols/Aws_query.ts b/clients/client-sts/protocols/Aws_query.ts
index 9d556ba1d7656..5556dd112ce3d 100644
--- a/clients/client-sts/protocols/Aws_query.ts
+++ b/clients/client-sts/protocols/Aws_query.ts
@@ -1214,7 +1214,7 @@ const serializeAws_querypolicyDescriptorListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryPolicyDescriptorType(
       entry,
       context
@@ -1223,7 +1223,7 @@ const serializeAws_querypolicyDescriptorListType = (
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -1233,10 +1233,10 @@ const serializeAws_querytagKeyListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     entries[`member.${counter}`] = entry;
     counter++;
-  });
+  }
   return entries;
 };
 
@@ -1246,13 +1246,13 @@ const serializeAws_querytagListType = (
 ): any => {
   const entries: any = {};
   let counter = 1;
-  (input || []).map(entry => {
+  for (let entry of input) {
     const memberEntries = serializeAws_queryTag(entry, context);
     Object.keys(memberEntries).forEach(key => {
       entries[`member.${counter}.${key}`] = memberEntries[key];
     });
     counter++;
-  });
+  }
   return entries;
 };
 
diff --git a/clients/client-support/protocols/Aws_json1_1.ts b/clients/client-support/protocols/Aws_json1_1.ts
index 0afa75972f671..32c46c5ef4dc7 100644
--- a/clients/client-support/protocols/Aws_json1_1.ts
+++ b/clients/client-support/protocols/Aws_json1_1.ts
@@ -1530,9 +1530,11 @@ const serializeAws_json1_1Attachments = (
   input: Array<Attachment>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Attachment(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Attachment(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1AddAttachmentsToSetRequest = (
@@ -1579,14 +1581,22 @@ const serializeAws_json1_1CaseIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CcEmailAddressList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateCaseRequest = (
@@ -1742,7 +1752,11 @@ const serializeAws_json1_1ServiceCodeList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DescribeTrustedAdvisorCheckRefreshStatusesRequest = (
@@ -1813,7 +1827,11 @@ const serializeAws_json1_1StringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1Attachment = (
diff --git a/clients/client-swf/protocols/Aws_json1_0.ts b/clients/client-swf/protocols/Aws_json1_0.ts
index 76d9483d25836..2e61835847236 100644
--- a/clients/client-swf/protocols/Aws_json1_0.ts
+++ b/clients/client-swf/protocols/Aws_json1_0.ts
@@ -4002,9 +4002,11 @@ const serializeAws_json1_0DecisionList = (
   input: Array<Decision>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0Decision(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0Decision(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ExecutionTimeFilter = (
@@ -4095,16 +4097,22 @@ const serializeAws_json1_0ResourceTagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ResourceTagList = (
   input: Array<ResourceTag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_0ResourceTag(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_0ResourceTag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_0ScheduleActivityTaskDecisionAttributes = (
@@ -4277,7 +4285,11 @@ const serializeAws_json1_0TagList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_0TaskList = (
diff --git a/clients/client-textract/protocols/Aws_json1_1.ts b/clients/client-textract/protocols/Aws_json1_1.ts
index 956f5247acfc9..d04a0a04156f5 100644
--- a/clients/client-textract/protocols/Aws_json1_1.ts
+++ b/clients/client-textract/protocols/Aws_json1_1.ts
@@ -1275,7 +1275,11 @@ const serializeAws_json1_1ContentClassifiers = (
   input: Array<ContentClassifier | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DetectDocumentTextRequest = (
@@ -1327,7 +1331,11 @@ const serializeAws_json1_1FeatureTypes = (
   input: Array<FeatureType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetDocumentAnalysisRequest = (
diff --git a/clients/client-transcribe/protocols/Aws_json1_1.ts b/clients/client-transcribe/protocols/Aws_json1_1.ts
index b58f8a3733f0b..04e3427abb580 100644
--- a/clients/client-transcribe/protocols/Aws_json1_1.ts
+++ b/clients/client-transcribe/protocols/Aws_json1_1.ts
@@ -1822,7 +1822,11 @@ const serializeAws_json1_1Phrases = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Settings = (
@@ -1941,7 +1945,11 @@ const serializeAws_json1_1Words = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1BadRequestException = (
diff --git a/clients/client-transfer/protocols/Aws_json1_1.ts b/clients/client-transfer/protocols/Aws_json1_1.ts
index c55fc0b8db28d..f490124058737 100644
--- a/clients/client-transfer/protocols/Aws_json1_1.ts
+++ b/clients/client-transfer/protocols/Aws_json1_1.ts
@@ -2211,7 +2211,11 @@ const serializeAws_json1_1AddressAllocationIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateServerRequest = (
@@ -2404,9 +2408,11 @@ const serializeAws_json1_1HomeDirectoryMappings = (
   input: Array<HomeDirectoryMapEntry>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1HomeDirectoryMapEntry(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1HomeDirectoryMapEntry(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IdentityProviderDetails = (
@@ -2514,7 +2520,11 @@ const serializeAws_json1_1SubnetIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -2532,7 +2542,11 @@ const serializeAws_json1_1TagKeys = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -2553,7 +2567,11 @@ const serializeAws_json1_1Tags = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TestIdentityProviderRequest = (
diff --git a/clients/client-translate/protocols/Aws_json1_1.ts b/clients/client-translate/protocols/Aws_json1_1.ts
index 271e01f1886b4..6fbc33b797e80 100644
--- a/clients/client-translate/protocols/Aws_json1_1.ts
+++ b/clients/client-translate/protocols/Aws_json1_1.ts
@@ -1393,7 +1393,11 @@ const serializeAws_json1_1ResourceNameList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartTextTranslationJobRequest = (
@@ -1460,7 +1464,11 @@ const serializeAws_json1_1TargetLanguageCodeStringList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TerminologyData = (
diff --git a/clients/client-waf-regional/protocols/Aws_json1_1.ts b/clients/client-waf-regional/protocols/Aws_json1_1.ts
index 1137a3599b2e3..c2d63f5127c9f 100644
--- a/clients/client-waf-regional/protocols/Aws_json1_1.ts
+++ b/clients/client-waf-regional/protocols/Aws_json1_1.ts
@@ -10094,9 +10094,11 @@ const serializeAws_json1_1ByteMatchSetUpdates = (
   input: Array<ByteMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ByteMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ByteMatchSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ByteMatchTuple = (
@@ -10531,9 +10533,11 @@ const serializeAws_json1_1ExcludedRules = (
   input: Array<ExcludedRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ExcludedRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ExcludedRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FieldToMatch = (
@@ -10585,9 +10589,11 @@ const serializeAws_json1_1GeoMatchSetUpdates = (
   input: Array<GeoMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1GeoMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1GeoMatchSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetByteMatchSetRequest = (
@@ -10835,9 +10841,11 @@ const serializeAws_json1_1IPSetUpdates = (
   input: Array<IPSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IPSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1IPSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListActivatedRulesInRuleGroupRequest = (
@@ -11074,7 +11082,11 @@ const serializeAws_json1_1LogDestinationConfigs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LoggingConfiguration = (
@@ -11153,9 +11165,11 @@ const serializeAws_json1_1RedactedFields = (
   input: Array<FieldToMatch>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1FieldToMatch(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1FieldToMatch(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegexMatchSetUpdate = (
@@ -11179,9 +11193,11 @@ const serializeAws_json1_1RegexMatchSetUpdates = (
   input: Array<RegexMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RegexMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RegexMatchSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegexMatchTuple = (
@@ -11222,9 +11238,11 @@ const serializeAws_json1_1RegexPatternSetUpdates = (
   input: Array<RegexPatternSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RegexPatternSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RegexPatternSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RuleGroupUpdate = (
@@ -11248,9 +11266,11 @@ const serializeAws_json1_1RuleGroupUpdates = (
   input: Array<RuleGroupUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RuleGroupUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RuleGroupUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RuleUpdate = (
@@ -11274,9 +11294,11 @@ const serializeAws_json1_1RuleUpdates = (
   input: Array<RuleUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RuleUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RuleUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SizeConstraint = (
@@ -11323,9 +11345,11 @@ const serializeAws_json1_1SizeConstraintSetUpdates = (
   input: Array<SizeConstraintSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SizeConstraintSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SizeConstraintSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SqlInjectionMatchSetUpdate = (
@@ -11351,9 +11375,13 @@ const serializeAws_json1_1SqlInjectionMatchSetUpdates = (
   input: Array<SqlInjectionMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SqlInjectionMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1SqlInjectionMatchSetUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SqlInjectionMatchTuple = (
@@ -11388,14 +11416,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -11735,9 +11771,11 @@ const serializeAws_json1_1WebACLUpdates = (
   input: Array<WebACLUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1WebACLUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1WebACLUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1XssMatchSetUpdate = (
@@ -11761,9 +11799,11 @@ const serializeAws_json1_1XssMatchSetUpdates = (
   input: Array<XssMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1XssMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1XssMatchSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1XssMatchTuple = (
diff --git a/clients/client-waf/protocols/Aws_json1_1.ts b/clients/client-waf/protocols/Aws_json1_1.ts
index b5150deb751aa..1a3be0af9f464 100644
--- a/clients/client-waf/protocols/Aws_json1_1.ts
+++ b/clients/client-waf/protocols/Aws_json1_1.ts
@@ -9549,9 +9549,11 @@ const serializeAws_json1_1ByteMatchSetUpdates = (
   input: Array<ByteMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ByteMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ByteMatchSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ByteMatchTuple = (
@@ -9986,9 +9988,11 @@ const serializeAws_json1_1ExcludedRules = (
   input: Array<ExcludedRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ExcludedRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ExcludedRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FieldToMatch = (
@@ -10040,9 +10044,11 @@ const serializeAws_json1_1GeoMatchSetUpdates = (
   input: Array<GeoMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1GeoMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1GeoMatchSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1GetByteMatchSetRequest = (
@@ -10290,9 +10296,11 @@ const serializeAws_json1_1IPSetUpdates = (
   input: Array<IPSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IPSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1IPSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListActivatedRulesInRuleGroupRequest = (
@@ -10529,7 +10537,11 @@ const serializeAws_json1_1LogDestinationConfigs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LoggingConfiguration = (
@@ -10608,9 +10620,11 @@ const serializeAws_json1_1RedactedFields = (
   input: Array<FieldToMatch>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1FieldToMatch(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1FieldToMatch(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegexMatchSetUpdate = (
@@ -10634,9 +10648,11 @@ const serializeAws_json1_1RegexMatchSetUpdates = (
   input: Array<RegexMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RegexMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RegexMatchSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RegexMatchTuple = (
@@ -10677,9 +10693,11 @@ const serializeAws_json1_1RegexPatternSetUpdates = (
   input: Array<RegexPatternSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RegexPatternSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RegexPatternSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RuleGroupUpdate = (
@@ -10703,9 +10721,11 @@ const serializeAws_json1_1RuleGroupUpdates = (
   input: Array<RuleGroupUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RuleGroupUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RuleGroupUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RuleUpdate = (
@@ -10729,9 +10749,11 @@ const serializeAws_json1_1RuleUpdates = (
   input: Array<RuleUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RuleUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RuleUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SizeConstraint = (
@@ -10778,9 +10800,11 @@ const serializeAws_json1_1SizeConstraintSetUpdates = (
   input: Array<SizeConstraintSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SizeConstraintSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1SizeConstraintSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SqlInjectionMatchSetUpdate = (
@@ -10806,9 +10830,13 @@ const serializeAws_json1_1SqlInjectionMatchSetUpdates = (
   input: Array<SqlInjectionMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1SqlInjectionMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_json1_1SqlInjectionMatchSetUpdate(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SqlInjectionMatchTuple = (
@@ -10843,14 +10871,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -11190,9 +11226,11 @@ const serializeAws_json1_1WebACLUpdates = (
   input: Array<WebACLUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1WebACLUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1WebACLUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1XssMatchSetUpdate = (
@@ -11216,9 +11254,11 @@ const serializeAws_json1_1XssMatchSetUpdates = (
   input: Array<XssMatchSetUpdate>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1XssMatchSetUpdate(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1XssMatchSetUpdate(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1XssMatchTuple = (
diff --git a/clients/client-wafv2/protocols/Aws_json1_1.ts b/clients/client-wafv2/protocols/Aws_json1_1.ts
index b65e16c41e910..7b6f43506a2e2 100644
--- a/clients/client-wafv2/protocols/Aws_json1_1.ts
+++ b/clients/client-wafv2/protocols/Aws_json1_1.ts
@@ -4589,7 +4589,11 @@ const serializeAws_json1_1CountryCodes = (
   input: Array<CountryCode | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1CreateIPSetRequest = (
@@ -4864,9 +4868,11 @@ const serializeAws_json1_1ExcludedRules = (
   input: Array<ExcludedRule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1ExcludedRule(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1ExcludedRule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1FieldToMatch = (
@@ -5064,7 +5070,11 @@ const serializeAws_json1_1IPAddresses = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IPSetReferenceStatement = (
@@ -5215,7 +5225,11 @@ const serializeAws_json1_1LogDestinationConfigs = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1LoggingConfiguration = (
@@ -5369,9 +5383,11 @@ const serializeAws_json1_1RedactedFields = (
   input: Array<FieldToMatch>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1FieldToMatch(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1FieldToMatch(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Regex = (
@@ -5412,7 +5428,11 @@ const serializeAws_json1_1RegularExpressionList = (
   input: Array<Regex>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Regex(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Regex(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Rule = (
@@ -5491,7 +5511,11 @@ const serializeAws_json1_1Rules = (
   input: Array<Rule>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Rule(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Rule(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1SingleHeader = (
@@ -5662,9 +5686,11 @@ const serializeAws_json1_1Statements = (
   input: Array<Statement>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1Statement(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Statement(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -5682,14 +5708,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagResourceRequest = (
@@ -5724,9 +5758,11 @@ const serializeAws_json1_1TextTransformations = (
   input: Array<TextTransformation>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TextTransformation(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TextTransformation(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TimeWindow = (
diff --git a/clients/client-workdocs/protocols/Aws_restJson1_1.ts b/clients/client-workdocs/protocols/Aws_restJson1_1.ts
index e35cd2da7b8d5..2ef148562268a 100644
--- a/clients/client-workdocs/protocols/Aws_restJson1_1.ts
+++ b/clients/client-workdocs/protocols/Aws_restJson1_1.ts
@@ -6945,16 +6945,22 @@ const serializeAws_restJson1_1SharePrincipalList = (
   input: Array<SharePrincipal>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SharePrincipal(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1SharePrincipal(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SharedLabels = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1StorageRuleType = (
diff --git a/clients/client-worklink/protocols/Aws_restJson1_1.ts b/clients/client-worklink/protocols/Aws_restJson1_1.ts
index 2438aa72ff420..093bfd50ed192 100644
--- a/clients/client-worklink/protocols/Aws_restJson1_1.ts
+++ b/clients/client-worklink/protocols/Aws_restJson1_1.ts
@@ -4146,14 +4146,22 @@ const serializeAws_restJson1_1SecurityGroupIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SubnetIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1DeviceSummary = (
diff --git a/clients/client-workmail/protocols/Aws_json1_1.ts b/clients/client-workmail/protocols/Aws_json1_1.ts
index 69851267e838e..36a50dc6b00ce 100644
--- a/clients/client-workmail/protocols/Aws_json1_1.ts
+++ b/clients/client-workmail/protocols/Aws_json1_1.ts
@@ -4999,7 +4999,11 @@ const serializeAws_json1_1PermissionValues = (
   input: Array<PermissionType | string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1PutMailboxPermissionsRequest = (
diff --git a/clients/client-workspaces/protocols/Aws_json1_1.ts b/clients/client-workspaces/protocols/Aws_json1_1.ts
index 7423b3a4981c1..10448ab7c829f 100644
--- a/clients/client-workspaces/protocols/Aws_json1_1.ts
+++ b/clients/client-workspaces/protocols/Aws_json1_1.ts
@@ -4516,7 +4516,11 @@ const serializeAws_json1_1BundleIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ClientProperties = (
@@ -4839,7 +4843,11 @@ const serializeAws_json1_1DirectoryIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1DisassociateIpGroupsRequest = (
@@ -4886,14 +4894,22 @@ const serializeAws_json1_1IpGroupIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IpRevokedRuleList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1IpRuleItem = (
@@ -4914,9 +4930,11 @@ const serializeAws_json1_1IpRuleList = (
   input: Array<IpRuleItem>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1IpRuleItem(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1IpRuleItem(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1ListAvailableManagementCidrRangesRequest = (
@@ -5086,9 +5104,11 @@ const serializeAws_json1_1RebootWorkspaceRequests = (
   input: Array<RebootRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RebootRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RebootRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RebootWorkspacesRequest = (
@@ -5122,9 +5142,11 @@ const serializeAws_json1_1RebuildWorkspaceRequests = (
   input: Array<RebuildRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1RebuildRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1RebuildRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RebuildWorkspacesRequest = (
@@ -5176,7 +5198,11 @@ const serializeAws_json1_1ResourceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1RestoreWorkspaceRequest = (
@@ -5245,9 +5271,11 @@ const serializeAws_json1_1StartWorkspaceRequests = (
   input: Array<StartRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1StartRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1StartRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StartWorkspacesRequest = (
@@ -5281,9 +5309,11 @@ const serializeAws_json1_1StopWorkspaceRequests = (
   input: Array<StopRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1StopRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1StopRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1StopWorkspacesRequest = (
@@ -5306,7 +5336,11 @@ const serializeAws_json1_1SubnetIds = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1Tag = (input: Tag, context: __SerdeContext): any => {
@@ -5324,14 +5358,22 @@ const serializeAws_json1_1TagKeyList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TagList = (
   input: Array<Tag>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => serializeAws_json1_1Tag(entry, context));
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1Tag(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TerminateRequest = (
@@ -5349,9 +5391,11 @@ const serializeAws_json1_1TerminateWorkspaceRequests = (
   input: Array<TerminateRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1TerminateRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1TerminateRequest(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_json1_1TerminateWorkspacesRequest = (
@@ -5444,14 +5488,22 @@ const serializeAws_json1_1WorkspaceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1WorkspaceImageIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_json1_1WorkspaceProperties = (
@@ -5519,9 +5571,11 @@ const serializeAws_json1_1WorkspaceRequestList = (
   input: Array<WorkspaceRequest>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_json1_1WorkspaceRequest(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_json1_1WorkspaceRequest(entry, context));
+  }
+  return contents;
 };
 
 const deserializeAws_json1_1AccessDeniedException = (
diff --git a/clients/client-xray/protocols/Aws_restJson1_1.ts b/clients/client-xray/protocols/Aws_restJson1_1.ts
index 6417da75514ed..c45aa36ff58bd 100644
--- a/clients/client-xray/protocols/Aws_restJson1_1.ts
+++ b/clients/client-xray/protocols/Aws_restJson1_1.ts
@@ -2449,9 +2449,13 @@ const serializeAws_restJson1_1SamplingStatisticsDocumentList = (
   input: Array<SamplingStatisticsDocument>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1SamplingStatisticsDocument(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(
+      serializeAws_restJson1_1SamplingStatisticsDocument(entry, context)
+    );
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1SamplingStrategy = (
@@ -2503,23 +2507,33 @@ const serializeAws_restJson1_1TelemetryRecordList = (
   input: Array<TelemetryRecord>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry =>
-    serializeAws_restJson1_1TelemetryRecord(entry, context)
-  );
+  const contents = [];
+  for (let entry of input) {
+    contents.push(serializeAws_restJson1_1TelemetryRecord(entry, context));
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TraceIdList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const serializeAws_restJson1_1TraceSegmentDocumentList = (
   input: Array<string>,
   context: __SerdeContext
 ): any => {
-  return (input || []).map(entry => entry);
+  const contents = [];
+  for (let entry of input) {
+    contents.push(entry);
+  }
+  return contents;
 };
 
 const deserializeAws_restJson1_1Alias = (