diff --git a/Config/metadata/V1/Config.php b/Config/metadata/V1/Config.php
index 87d54d274f6e..76c04959bbec 100644
Binary files a/Config/metadata/V1/Config.php and b/Config/metadata/V1/Config.php differ
diff --git a/Config/samples/V1/ConfigClient/create_deployment.php b/Config/samples/V1/ConfigClient/create_deployment.php
index 0a8cbb394f7e..14eab74de58b 100644
--- a/Config/samples/V1/ConfigClient/create_deployment.php
+++ b/Config/samples/V1/ConfigClient/create_deployment.php
@@ -33,18 +33,26 @@
 /**
  * Creates a [Deployment][google.cloud.config.v1.Deployment].
  *
- * @param string $formattedParent The parent in whose context the Deployment is created. The parent
- *                                value is in the format: 'projects/{project_id}/locations/{location}'. Please see
- *                                {@see ConfigClient::locationName()} for help formatting this field.
- * @param string $deploymentId    The Deployment ID.
+ * @param string $formattedParent                   The parent in whose context the Deployment is created. The parent
+ *                                                  value is in the format: 'projects/{project_id}/locations/{location}'. Please see
+ *                                                  {@see ConfigClient::locationName()} for help formatting this field.
+ * @param string $deploymentId                      The Deployment ID.
+ * @param string $formattedDeploymentServiceAccount User-specified Service Account (SA) credentials to be used when
+ *                                                  actuating resources.
+ *                                                  Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
+ *                                                  Please see {@see ConfigClient::serviceAccountName()} for help formatting this field.
  */
-function create_deployment_sample(string $formattedParent, string $deploymentId): void
-{
+function create_deployment_sample(
+    string $formattedParent,
+    string $deploymentId,
+    string $formattedDeploymentServiceAccount
+): void {
     // Create a client.
     $configClient = new ConfigClient();
 
     // Prepare the request message.
-    $deployment = new Deployment();
+    $deployment = (new Deployment())
+        ->setServiceAccount($formattedDeploymentServiceAccount);
     $request = (new CreateDeploymentRequest())
         ->setParent($formattedParent)
         ->setDeploymentId($deploymentId)
@@ -83,7 +91,11 @@ function callSample(): void
 {
     $formattedParent = ConfigClient::locationName('[PROJECT]', '[LOCATION]');
     $deploymentId = '[DEPLOYMENT_ID]';
+    $formattedDeploymentServiceAccount = ConfigClient::serviceAccountName(
+        '[PROJECT]',
+        '[SERVICE_ACCOUNT]'
+    );
 
-    create_deployment_sample($formattedParent, $deploymentId);
+    create_deployment_sample($formattedParent, $deploymentId, $formattedDeploymentServiceAccount);
 }
 // [END config_v1_generated_Config_CreateDeployment_sync]
diff --git a/Config/samples/V1/ConfigClient/create_preview.php b/Config/samples/V1/ConfigClient/create_preview.php
index 463618bedd10..69c8a2b7c34a 100644
--- a/Config/samples/V1/ConfigClient/create_preview.php
+++ b/Config/samples/V1/ConfigClient/create_preview.php
@@ -33,17 +33,24 @@
 /**
  * Creates a [Preview][google.cloud.config.v1.Preview].
  *
- * @param string $formattedParent The parent in whose context the Preview is created. The parent
- *                                value is in the format: 'projects/{project_id}/locations/{location}'. Please see
- *                                {@see ConfigClient::locationName()} for help formatting this field.
+ * @param string $formattedParent                The parent in whose context the Preview is created. The parent
+ *                                               value is in the format: 'projects/{project_id}/locations/{location}'. Please see
+ *                                               {@see ConfigClient::locationName()} for help formatting this field.
+ * @param string $formattedPreviewServiceAccount User-specified Service Account (SA) credentials to be used when
+ *                                               previewing resources.
+ *                                               Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
+ *                                               Please see {@see ConfigClient::serviceAccountName()} for help formatting this field.
  */
-function create_preview_sample(string $formattedParent): void
-{
+function create_preview_sample(
+    string $formattedParent,
+    string $formattedPreviewServiceAccount
+): void {
     // Create a client.
     $configClient = new ConfigClient();
 
     // Prepare the request message.
-    $preview = new Preview();
+    $preview = (new Preview())
+        ->setServiceAccount($formattedPreviewServiceAccount);
     $request = (new CreatePreviewRequest())
         ->setParent($formattedParent)
         ->setPreview($preview);
@@ -80,7 +87,11 @@ function create_preview_sample(string $formattedParent): void
 function callSample(): void
 {
     $formattedParent = ConfigClient::locationName('[PROJECT]', '[LOCATION]');
+    $formattedPreviewServiceAccount = ConfigClient::serviceAccountName(
+        '[PROJECT]',
+        '[SERVICE_ACCOUNT]'
+    );
 
-    create_preview_sample($formattedParent);
+    create_preview_sample($formattedParent, $formattedPreviewServiceAccount);
 }
 // [END config_v1_generated_Config_CreatePreview_sync]
diff --git a/Config/samples/V1/ConfigClient/list_resources.php b/Config/samples/V1/ConfigClient/list_resources.php
index f267bfd99408..7be8bab944a0 100644
--- a/Config/samples/V1/ConfigClient/list_resources.php
+++ b/Config/samples/V1/ConfigClient/list_resources.php
@@ -30,7 +30,7 @@
 use Google\Cloud\Config\V1\Resource;
 
 /**
- * Lists [Resource][google.cloud.config.v1.Resource]s in a given revision.
+ * Lists [Resources][google.cloud.config.v1.Resource] in a given revision.
  *
  * @param string $formattedParent The parent in whose context the Resources are listed. The parent
  *                                value is in the format:
diff --git a/Config/samples/V1/ConfigClient/update_deployment.php b/Config/samples/V1/ConfigClient/update_deployment.php
index 5c0bbd975897..cae5980e6ada 100644
--- a/Config/samples/V1/ConfigClient/update_deployment.php
+++ b/Config/samples/V1/ConfigClient/update_deployment.php
@@ -33,19 +33,19 @@
 /**
  * Updates a [Deployment][google.cloud.config.v1.Deployment].
  *
- * This sample has been automatically generated and should be regarded as a code
- * template only. It will require modifications to work:
- *  - It may require correct/in-range values for request initialization.
- *  - It may require specifying regional endpoints when creating the service client,
- *    please see the apiEndpoint client configuration option for more details.
+ * @param string $formattedDeploymentServiceAccount User-specified Service Account (SA) credentials to be used when
+ *                                                  actuating resources.
+ *                                                  Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
+ *                                                  Please see {@see ConfigClient::serviceAccountName()} for help formatting this field.
  */
-function update_deployment_sample(): void
+function update_deployment_sample(string $formattedDeploymentServiceAccount): void
 {
     // Create a client.
     $configClient = new ConfigClient();
 
     // Prepare the request message.
-    $deployment = new Deployment();
+    $deployment = (new Deployment())
+        ->setServiceAccount($formattedDeploymentServiceAccount);
     $request = (new UpdateDeploymentRequest())
         ->setDeployment($deployment);
 
@@ -68,4 +68,23 @@ function update_deployment_sample(): void
         printf('Call failed with message: %s' . PHP_EOL, $ex->getMessage());
     }
 }
+
+/**
+ * Helper to execute the sample.
+ *
+ * This sample has been automatically generated and should be regarded as a code
+ * template only. It will require modifications to work:
+ *  - It may require correct/in-range values for request initialization.
+ *  - It may require specifying regional endpoints when creating the service client,
+ *    please see the apiEndpoint client configuration option for more details.
+ */
+function callSample(): void
+{
+    $formattedDeploymentServiceAccount = ConfigClient::serviceAccountName(
+        '[PROJECT]',
+        '[SERVICE_ACCOUNT]'
+    );
+
+    update_deployment_sample($formattedDeploymentServiceAccount);
+}
 // [END config_v1_generated_Config_UpdateDeployment_sync]
diff --git a/Config/src/V1/Client/ConfigClient.php b/Config/src/V1/Client/ConfigClient.php
index d7ab01e98add..f911f0dcfcff 100644
--- a/Config/src/V1/Client/ConfigClient.php
+++ b/Config/src/V1/Client/ConfigClient.php
@@ -932,7 +932,7 @@ public function listPreviews(ListPreviewsRequest $request, array $callOptions =
     }
 
     /**
-     * Lists [Resource][google.cloud.config.v1.Resource]s in a given revision.
+     * Lists [Resources][google.cloud.config.v1.Resource] in a given revision.
      *
      * The async variant is {@see ConfigClient::listResourcesAsync()} .
      *
diff --git a/Config/src/V1/Deployment.php b/Config/src/V1/Deployment.php
index fab01d82f4b0..48f291aaaa5a 100644
--- a/Config/src/V1/Deployment.php
+++ b/Config/src/V1/Deployment.php
@@ -116,11 +116,11 @@ class Deployment extends \Google\Protobuf\Internal\Message
      */
     protected $artifacts_gcs_bucket = null;
     /**
-     * Optional. User-specified Service Account (SA) credentials to be used when
+     * Required. User-specified Service Account (SA) credentials to be used when
      * actuating resources.
      * Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
      *
-     * Generated from protobuf field <code>optional string service_account = 16 [(.google.api.field_behavior) = OPTIONAL, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>optional string service_account = 16 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     protected $service_account = null;
     /**
@@ -236,7 +236,7 @@ class Deployment extends \Google\Protobuf\Internal\Message
      *           - The path cannot be within the path of `gcs_source`
      *           - The field cannot be updated, including changing its presence
      *     @type string $service_account
-     *           Optional. User-specified Service Account (SA) credentials to be used when
+     *           Required. User-specified Service Account (SA) credentials to be used when
      *           actuating resources.
      *           Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
      *     @type bool $import_existing_resources
@@ -744,11 +744,11 @@ public function setArtifactsGcsBucket($var)
     }
 
     /**
-     * Optional. User-specified Service Account (SA) credentials to be used when
+     * Required. User-specified Service Account (SA) credentials to be used when
      * actuating resources.
      * Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
      *
-     * Generated from protobuf field <code>optional string service_account = 16 [(.google.api.field_behavior) = OPTIONAL, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>optional string service_account = 16 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getServiceAccount()
@@ -767,11 +767,11 @@ public function clearServiceAccount()
     }
 
     /**
-     * Optional. User-specified Service Account (SA) credentials to be used when
+     * Required. User-specified Service Account (SA) credentials to be used when
      * actuating resources.
      * Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
      *
-     * Generated from protobuf field <code>optional string service_account = 16 [(.google.api.field_behavior) = OPTIONAL, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>optional string service_account = 16 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
diff --git a/Config/src/V1/ListPreviewsResponse.php b/Config/src/V1/ListPreviewsResponse.php
index f4532c3073de..e7c4f730627f 100644
--- a/Config/src/V1/ListPreviewsResponse.php
+++ b/Config/src/V1/ListPreviewsResponse.php
@@ -16,7 +16,7 @@
 class ListPreviewsResponse extends \Google\Protobuf\Internal\Message
 {
     /**
-     * List of [Previews][]s.
+     * List of [Previews][google.cloud.config.v1.Preview].
      *
      * Generated from protobuf field <code>repeated .google.cloud.config.v1.Preview previews = 1;</code>
      */
@@ -42,7 +42,7 @@ class ListPreviewsResponse extends \Google\Protobuf\Internal\Message
      *     Optional. Data for populating the Message object.
      *
      *     @type array<\Google\Cloud\Config\V1\Preview>|\Google\Protobuf\Internal\RepeatedField $previews
-     *           List of [Previews][]s.
+     *           List of [Previews][google.cloud.config.v1.Preview].
      *     @type string $next_page_token
      *           Token to be supplied to the next ListPreviews request via `page_token`
      *           to obtain the next set of results.
@@ -56,7 +56,7 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * List of [Previews][]s.
+     * List of [Previews][google.cloud.config.v1.Preview].
      *
      * Generated from protobuf field <code>repeated .google.cloud.config.v1.Preview previews = 1;</code>
      * @return \Google\Protobuf\Internal\RepeatedField
@@ -67,7 +67,7 @@ public function getPreviews()
     }
 
     /**
-     * List of [Previews][]s.
+     * List of [Previews][google.cloud.config.v1.Preview].
      *
      * Generated from protobuf field <code>repeated .google.cloud.config.v1.Preview previews = 1;</code>
      * @param array<\Google\Cloud\Config\V1\Preview>|\Google\Protobuf\Internal\RepeatedField $var
diff --git a/Config/src/V1/ListResourcesResponse.php b/Config/src/V1/ListResourcesResponse.php
index 8818e638ae51..9fbb5d698634 100644
--- a/Config/src/V1/ListResourcesResponse.php
+++ b/Config/src/V1/ListResourcesResponse.php
@@ -16,7 +16,7 @@
 class ListResourcesResponse extends \Google\Protobuf\Internal\Message
 {
     /**
-     * List of [Resources][]s.
+     * List of [Resources][google.cloud.config.v1.Resource].
      *
      * Generated from protobuf field <code>repeated .google.cloud.config.v1.Resource resources = 1;</code>
      */
@@ -43,7 +43,7 @@ class ListResourcesResponse extends \Google\Protobuf\Internal\Message
      *     Optional. Data for populating the Message object.
      *
      *     @type array<\Google\Cloud\Config\V1\Resource>|\Google\Protobuf\Internal\RepeatedField $resources
-     *           List of [Resources][]s.
+     *           List of [Resources][google.cloud.config.v1.Resource].
      *     @type string $next_page_token
      *           A token to request the next page of resources from the 'ListResources'
      *           method. The value of an empty string means that there are no more resources
@@ -58,7 +58,7 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * List of [Resources][]s.
+     * List of [Resources][google.cloud.config.v1.Resource].
      *
      * Generated from protobuf field <code>repeated .google.cloud.config.v1.Resource resources = 1;</code>
      * @return \Google\Protobuf\Internal\RepeatedField
@@ -69,7 +69,7 @@ public function getResources()
     }
 
     /**
-     * List of [Resources][]s.
+     * List of [Resources][google.cloud.config.v1.Resource].
      *
      * Generated from protobuf field <code>repeated .google.cloud.config.v1.Resource resources = 1;</code>
      * @param array<\Google\Cloud\Config\V1\Resource>|\Google\Protobuf\Internal\RepeatedField $var
diff --git a/Config/src/V1/OperationMetadata.php b/Config/src/V1/OperationMetadata.php
index 901be5abadb3..9a5c179c676a 100644
--- a/Config/src/V1/OperationMetadata.php
+++ b/Config/src/V1/OperationMetadata.php
@@ -48,9 +48,9 @@ class OperationMetadata extends \Google\Protobuf\Internal\Message
     /**
      * Output only. Identifies whether the user has requested cancellation of the
      * operation. Operations that have successfully been cancelled have
-     * [Operation.error][] value with a
-     * [google.rpc.Status.code][google.rpc.Status.code] of 1, corresponding to
-     * `Code.CANCELLED`.
+     * [google.longrunning.Operation.error][google.longrunning.Operation.error]
+     * value with a [google.rpc.Status.code][google.rpc.Status.code] of `1`,
+     * corresponding to `Code.CANCELLED`.
      *
      * Generated from protobuf field <code>bool requested_cancellation = 6 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      */
@@ -86,9 +86,9 @@ class OperationMetadata extends \Google\Protobuf\Internal\Message
      *     @type bool $requested_cancellation
      *           Output only. Identifies whether the user has requested cancellation of the
      *           operation. Operations that have successfully been cancelled have
-     *           [Operation.error][] value with a
-     *           [google.rpc.Status.code][google.rpc.Status.code] of 1, corresponding to
-     *           `Code.CANCELLED`.
+     *           [google.longrunning.Operation.error][google.longrunning.Operation.error]
+     *           value with a [google.rpc.Status.code][google.rpc.Status.code] of `1`,
+     *           corresponding to `Code.CANCELLED`.
      *     @type string $api_version
      *           Output only. API version used to start the operation.
      * }
@@ -313,9 +313,9 @@ public function setStatusMessage($var)
     /**
      * Output only. Identifies whether the user has requested cancellation of the
      * operation. Operations that have successfully been cancelled have
-     * [Operation.error][] value with a
-     * [google.rpc.Status.code][google.rpc.Status.code] of 1, corresponding to
-     * `Code.CANCELLED`.
+     * [google.longrunning.Operation.error][google.longrunning.Operation.error]
+     * value with a [google.rpc.Status.code][google.rpc.Status.code] of `1`,
+     * corresponding to `Code.CANCELLED`.
      *
      * Generated from protobuf field <code>bool requested_cancellation = 6 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @return bool
@@ -328,9 +328,9 @@ public function getRequestedCancellation()
     /**
      * Output only. Identifies whether the user has requested cancellation of the
      * operation. Operations that have successfully been cancelled have
-     * [Operation.error][] value with a
-     * [google.rpc.Status.code][google.rpc.Status.code] of 1, corresponding to
-     * `Code.CANCELLED`.
+     * [google.longrunning.Operation.error][google.longrunning.Operation.error]
+     * value with a [google.rpc.Status.code][google.rpc.Status.code] of `1`,
+     * corresponding to `Code.CANCELLED`.
      *
      * Generated from protobuf field <code>bool requested_cancellation = 6 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>
      * @param bool $var
diff --git a/Config/src/V1/Preview.php b/Config/src/V1/Preview.php
index 4ad58204222f..85c609dc8971 100644
--- a/Config/src/V1/Preview.php
+++ b/Config/src/V1/Preview.php
@@ -59,11 +59,11 @@ class Preview extends \Google\Protobuf\Internal\Message
      */
     protected $preview_mode = 0;
     /**
-     * Optional. User-specified Service Account (SA) credentials to be used when
+     * Required. User-specified Service Account (SA) credentials to be used when
      * previewing resources.
      * Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
      *
-     * Generated from protobuf field <code>string service_account = 7 [(.google.api.field_behavior) = OPTIONAL, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string service_account = 7 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      */
     protected $service_account = '';
     /**
@@ -151,6 +151,15 @@ class Preview extends \Google\Protobuf\Internal\Message
      * Generated from protobuf field <code>optional string tf_version_constraint = 19 [(.google.api.field_behavior) = OPTIONAL];</code>
      */
     protected $tf_version_constraint = null;
+    /**
+     * Optional. Arbitrary key-value metadata storage e.g. to help client tools
+     * identifiy preview during automation. See
+     * https://google.aip.dev/148#annotations for details on format and size
+     * limitations.
+     *
+     * Generated from protobuf field <code>map<string, string> annotations = 20 [(.google.api.field_behavior) = OPTIONAL];</code>
+     */
+    private $annotations;
     protected $blueprint;
 
     /**
@@ -179,7 +188,7 @@ class Preview extends \Google\Protobuf\Internal\Message
      *     @type int $preview_mode
      *           Optional. Current mode of preview.
      *     @type string $service_account
-     *           Optional. User-specified Service Account (SA) credentials to be used when
+     *           Required. User-specified Service Account (SA) credentials to be used when
      *           previewing resources.
      *           Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
      *     @type string $artifacts_gcs_bucket
@@ -223,6 +232,11 @@ class Preview extends \Google\Protobuf\Internal\Message
      *     @type string $tf_version_constraint
      *           Optional. The user-specified Terraform version constraint.
      *           Example: "=1.3.10".
+     *     @type array|\Google\Protobuf\Internal\MapField $annotations
+     *           Optional. Arbitrary key-value metadata storage e.g. to help client tools
+     *           identifiy preview during automation. See
+     *           https://google.aip.dev/148#annotations for details on format and size
+     *           limitations.
      * }
      */
     public function __construct($data = NULL) {
@@ -438,11 +452,11 @@ public function setPreviewMode($var)
     }
 
     /**
-     * Optional. User-specified Service Account (SA) credentials to be used when
+     * Required. User-specified Service Account (SA) credentials to be used when
      * previewing resources.
      * Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
      *
-     * Generated from protobuf field <code>string service_account = 7 [(.google.api.field_behavior) = OPTIONAL, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string service_account = 7 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @return string
      */
     public function getServiceAccount()
@@ -451,11 +465,11 @@ public function getServiceAccount()
     }
 
     /**
-     * Optional. User-specified Service Account (SA) credentials to be used when
+     * Required. User-specified Service Account (SA) credentials to be used when
      * previewing resources.
      * Format: `projects/{projectID}/serviceAccounts/{serviceAccount}`
      *
-     * Generated from protobuf field <code>string service_account = 7 [(.google.api.field_behavior) = OPTIONAL, (.google.api.resource_reference) = {</code>
+     * Generated from protobuf field <code>string service_account = 7 [(.google.api.field_behavior) = REQUIRED, (.google.api.resource_reference) = {</code>
      * @param string $var
      * @return $this
      */
@@ -841,6 +855,38 @@ public function setTfVersionConstraint($var)
         return $this;
     }
 
+    /**
+     * Optional. Arbitrary key-value metadata storage e.g. to help client tools
+     * identifiy preview during automation. See
+     * https://google.aip.dev/148#annotations for details on format and size
+     * limitations.
+     *
+     * Generated from protobuf field <code>map<string, string> annotations = 20 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @return \Google\Protobuf\Internal\MapField
+     */
+    public function getAnnotations()
+    {
+        return $this->annotations;
+    }
+
+    /**
+     * Optional. Arbitrary key-value metadata storage e.g. to help client tools
+     * identifiy preview during automation. See
+     * https://google.aip.dev/148#annotations for details on format and size
+     * limitations.
+     *
+     * Generated from protobuf field <code>map<string, string> annotations = 20 [(.google.api.field_behavior) = OPTIONAL];</code>
+     * @param array|\Google\Protobuf\Internal\MapField $var
+     * @return $this
+     */
+    public function setAnnotations($var)
+    {
+        $arr = GPBUtil::checkMapField($var, \Google\Protobuf\Internal\GPBType::STRING, \Google\Protobuf\Internal\GPBType::STRING);
+        $this->annotations = $arr;
+
+        return $this;
+    }
+
     /**
      * @return string
      */
diff --git a/Config/src/V1/TerraformBlueprint.php b/Config/src/V1/TerraformBlueprint.php
index ff8aa54b5acd..aacdd4a0e7f2 100644
--- a/Config/src/V1/TerraformBlueprint.php
+++ b/Config/src/V1/TerraformBlueprint.php
@@ -31,12 +31,12 @@ class TerraformBlueprint extends \Google\Protobuf\Internal\Message
      *     Optional. Data for populating the Message object.
      *
      *     @type string $gcs_source
-     *           Required. URI of an object in Google Cloud Storage.
+     *           URI of an object in Google Cloud Storage.
      *           Format: `gs://{bucket}/{object}`
      *           URI may also specify an object version for zipped objects.
      *           Format: `gs://{bucket}/{object}#{version}`
      *     @type \Google\Cloud\Config\V1\GitSource $git_source
-     *           Required. URI of a public Git repo.
+     *           URI of a public Git repo.
      *     @type array|\Google\Protobuf\Internal\MapField $input_values
      *           Input variable values for the Terraform blueprint.
      * }
@@ -47,12 +47,12 @@ public function __construct($data = NULL) {
     }
 
     /**
-     * Required. URI of an object in Google Cloud Storage.
+     * URI of an object in Google Cloud Storage.
      * Format: `gs://{bucket}/{object}`
      * URI may also specify an object version for zipped objects.
      * Format: `gs://{bucket}/{object}#{version}`
      *
-     * Generated from protobuf field <code>string gcs_source = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * Generated from protobuf field <code>string gcs_source = 1;</code>
      * @return string
      */
     public function getGcsSource()
@@ -66,12 +66,12 @@ public function hasGcsSource()
     }
 
     /**
-     * Required. URI of an object in Google Cloud Storage.
+     * URI of an object in Google Cloud Storage.
      * Format: `gs://{bucket}/{object}`
      * URI may also specify an object version for zipped objects.
      * Format: `gs://{bucket}/{object}#{version}`
      *
-     * Generated from protobuf field <code>string gcs_source = 1 [(.google.api.field_behavior) = REQUIRED];</code>
+     * Generated from protobuf field <code>string gcs_source = 1;</code>
      * @param string $var
      * @return $this
      */
@@ -84,9 +84,9 @@ public function setGcsSource($var)
     }
 
     /**
-     * Required. URI of a public Git repo.
+     * URI of a public Git repo.
      *
-     * Generated from protobuf field <code>.google.cloud.config.v1.GitSource git_source = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     * Generated from protobuf field <code>.google.cloud.config.v1.GitSource git_source = 2;</code>
      * @return \Google\Cloud\Config\V1\GitSource|null
      */
     public function getGitSource()
@@ -100,9 +100,9 @@ public function hasGitSource()
     }
 
     /**
-     * Required. URI of a public Git repo.
+     * URI of a public Git repo.
      *
-     * Generated from protobuf field <code>.google.cloud.config.v1.GitSource git_source = 2 [(.google.api.field_behavior) = REQUIRED];</code>
+     * Generated from protobuf field <code>.google.cloud.config.v1.GitSource git_source = 2;</code>
      * @param \Google\Cloud\Config\V1\GitSource $var
      * @return $this
      */
diff --git a/Config/tests/Unit/V1/Client/ConfigClientTest.php b/Config/tests/Unit/V1/Client/ConfigClientTest.php
index 7792e970b36a..5b4ee12326a5 100644
--- a/Config/tests/Unit/V1/Client/ConfigClientTest.php
+++ b/Config/tests/Unit/V1/Client/ConfigClientTest.php
@@ -167,6 +167,8 @@ public function createDeploymentTest()
         $formattedParent = $gapicClient->locationName('[PROJECT]', '[LOCATION]');
         $deploymentId = 'deploymentId51250389';
         $deployment = new Deployment();
+        $deploymentServiceAccount = $gapicClient->serviceAccountName('[PROJECT]', '[SERVICE_ACCOUNT]');
+        $deployment->setServiceAccount($deploymentServiceAccount);
         $request = (new CreateDeploymentRequest())
             ->setParent($formattedParent)
             ->setDeploymentId($deploymentId)
@@ -244,6 +246,8 @@ public function createDeploymentExceptionTest()
         $formattedParent = $gapicClient->locationName('[PROJECT]', '[LOCATION]');
         $deploymentId = 'deploymentId51250389';
         $deployment = new Deployment();
+        $deploymentServiceAccount = $gapicClient->serviceAccountName('[PROJECT]', '[SERVICE_ACCOUNT]');
+        $deployment->setServiceAccount($deploymentServiceAccount);
         $request = (new CreateDeploymentRequest())
             ->setParent($formattedParent)
             ->setDeploymentId($deploymentId)
@@ -322,6 +326,8 @@ public function createPreviewTest()
         // Mock request
         $formattedParent = $gapicClient->locationName('[PROJECT]', '[LOCATION]');
         $preview = new Preview();
+        $previewServiceAccount = $gapicClient->serviceAccountName('[PROJECT]', '[SERVICE_ACCOUNT]');
+        $preview->setServiceAccount($previewServiceAccount);
         $request = (new CreatePreviewRequest())->setParent($formattedParent)->setPreview($preview);
         $response = $gapicClient->createPreview($request);
         $this->assertFalse($response->isDone());
@@ -393,6 +399,8 @@ public function createPreviewExceptionTest()
         // Mock request
         $formattedParent = $gapicClient->locationName('[PROJECT]', '[LOCATION]');
         $preview = new Preview();
+        $previewServiceAccount = $gapicClient->serviceAccountName('[PROJECT]', '[SERVICE_ACCOUNT]');
+        $preview->setServiceAccount($previewServiceAccount);
         $request = (new CreatePreviewRequest())->setParent($formattedParent)->setPreview($preview);
         $response = $gapicClient->createPreview($request);
         $this->assertFalse($response->isDone());
@@ -2208,6 +2216,8 @@ public function updateDeploymentTest()
         $operationsTransport->addResponse($completeOperation);
         // Mock request
         $deployment = new Deployment();
+        $deploymentServiceAccount = $gapicClient->serviceAccountName('[PROJECT]', '[SERVICE_ACCOUNT]');
+        $deployment->setServiceAccount($deploymentServiceAccount);
         $request = (new UpdateDeploymentRequest())->setDeployment($deployment);
         $response = $gapicClient->updateDeployment($request);
         $this->assertFalse($response->isDone());
@@ -2276,6 +2286,8 @@ public function updateDeploymentExceptionTest()
         $operationsTransport->addResponse(null, $status);
         // Mock request
         $deployment = new Deployment();
+        $deploymentServiceAccount = $gapicClient->serviceAccountName('[PROJECT]', '[SERVICE_ACCOUNT]');
+        $deployment->setServiceAccount($deploymentServiceAccount);
         $request = (new UpdateDeploymentRequest())->setDeployment($deployment);
         $response = $gapicClient->updateDeployment($request);
         $this->assertFalse($response->isDone());
@@ -2689,6 +2701,8 @@ public function createDeploymentAsyncTest()
         $formattedParent = $gapicClient->locationName('[PROJECT]', '[LOCATION]');
         $deploymentId = 'deploymentId51250389';
         $deployment = new Deployment();
+        $deploymentServiceAccount = $gapicClient->serviceAccountName('[PROJECT]', '[SERVICE_ACCOUNT]');
+        $deployment->setServiceAccount($deploymentServiceAccount);
         $request = (new CreateDeploymentRequest())
             ->setParent($formattedParent)
             ->setDeploymentId($deploymentId)