diff --git a/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcErrorGroupServiceStub.java b/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcErrorGroupServiceStub.java
index d013c0afbf49..761d1280bd9f 100644
--- a/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcErrorGroupServiceStub.java
+++ b/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcErrorGroupServiceStub.java
@@ -21,13 +21,16 @@
 import com.google.api.gax.grpc.GrpcCallSettings;
 import com.google.api.gax.grpc.GrpcStubCallableFactory;
 import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.RequestParamsExtractor;
 import com.google.api.gax.rpc.UnaryCallable;
+import com.google.common.collect.ImmutableMap;
 import com.google.devtools.clouderrorreporting.v1beta1.ErrorGroup;
 import com.google.devtools.clouderrorreporting.v1beta1.GetGroupRequest;
 import com.google.devtools.clouderrorreporting.v1beta1.UpdateGroupRequest;
 import io.grpc.MethodDescriptor;
 import io.grpc.protobuf.ProtoUtils;
 import java.io.IOException;
+import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
 
@@ -108,10 +111,28 @@ protected GrpcErrorGroupServiceStub(
     GrpcCallSettings<GetGroupRequest, ErrorGroup> getGroupTransportSettings =
         GrpcCallSettings.<GetGroupRequest, ErrorGroup>newBuilder()
             .setMethodDescriptor(getGroupMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<GetGroupRequest>() {
+                  @Override
+                  public Map<String, String> extract(GetGroupRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("group_name", String.valueOf(request.getGroupName()));
+                    return params.build();
+                  }
+                })
             .build();
     GrpcCallSettings<UpdateGroupRequest, ErrorGroup> updateGroupTransportSettings =
         GrpcCallSettings.<UpdateGroupRequest, ErrorGroup>newBuilder()
             .setMethodDescriptor(updateGroupMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<UpdateGroupRequest>() {
+                  @Override
+                  public Map<String, String> extract(UpdateGroupRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("group.name", String.valueOf(request.getGroup().getName()));
+                    return params.build();
+                  }
+                })
             .build();
 
     this.getGroupCallable =
diff --git a/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcErrorStatsServiceStub.java b/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcErrorStatsServiceStub.java
index bb0ab4777286..28a8e59acea2 100644
--- a/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcErrorStatsServiceStub.java
+++ b/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcErrorStatsServiceStub.java
@@ -24,7 +24,9 @@
 import com.google.api.gax.grpc.GrpcCallSettings;
 import com.google.api.gax.grpc.GrpcStubCallableFactory;
 import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.RequestParamsExtractor;
 import com.google.api.gax.rpc.UnaryCallable;
+import com.google.common.collect.ImmutableMap;
 import com.google.devtools.clouderrorreporting.v1beta1.DeleteEventsRequest;
 import com.google.devtools.clouderrorreporting.v1beta1.DeleteEventsResponse;
 import com.google.devtools.clouderrorreporting.v1beta1.ListEventsRequest;
@@ -34,6 +36,7 @@
 import io.grpc.MethodDescriptor;
 import io.grpc.protobuf.ProtoUtils;
 import java.io.IOException;
+import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
 
@@ -132,14 +135,41 @@ protected GrpcErrorStatsServiceStub(
         listGroupStatsTransportSettings =
             GrpcCallSettings.<ListGroupStatsRequest, ListGroupStatsResponse>newBuilder()
                 .setMethodDescriptor(listGroupStatsMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<ListGroupStatsRequest>() {
+                      @Override
+                      public Map<String, String> extract(ListGroupStatsRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("project_name", String.valueOf(request.getProjectName()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<ListEventsRequest, ListEventsResponse> listEventsTransportSettings =
         GrpcCallSettings.<ListEventsRequest, ListEventsResponse>newBuilder()
             .setMethodDescriptor(listEventsMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<ListEventsRequest>() {
+                  @Override
+                  public Map<String, String> extract(ListEventsRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("project_name", String.valueOf(request.getProjectName()));
+                    return params.build();
+                  }
+                })
             .build();
     GrpcCallSettings<DeleteEventsRequest, DeleteEventsResponse> deleteEventsTransportSettings =
         GrpcCallSettings.<DeleteEventsRequest, DeleteEventsResponse>newBuilder()
             .setMethodDescriptor(deleteEventsMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<DeleteEventsRequest>() {
+                  @Override
+                  public Map<String, String> extract(DeleteEventsRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("project_name", String.valueOf(request.getProjectName()));
+                    return params.build();
+                  }
+                })
             .build();
 
     this.listGroupStatsCallable =
diff --git a/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcReportErrorsServiceStub.java b/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcReportErrorsServiceStub.java
index 3678ecd88e0a..28b3cc56254b 100644
--- a/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcReportErrorsServiceStub.java
+++ b/google-cloud-clients/google-cloud-errorreporting/src/main/java/com/google/cloud/errorreporting/v1beta1/stub/GrpcReportErrorsServiceStub.java
@@ -21,12 +21,15 @@
 import com.google.api.gax.grpc.GrpcCallSettings;
 import com.google.api.gax.grpc.GrpcStubCallableFactory;
 import com.google.api.gax.rpc.ClientContext;
+import com.google.api.gax.rpc.RequestParamsExtractor;
 import com.google.api.gax.rpc.UnaryCallable;
+import com.google.common.collect.ImmutableMap;
 import com.google.devtools.clouderrorreporting.v1beta1.ReportErrorEventRequest;
 import com.google.devtools.clouderrorreporting.v1beta1.ReportErrorEventResponse;
 import io.grpc.MethodDescriptor;
 import io.grpc.protobuf.ProtoUtils;
 import java.io.IOException;
+import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
 
@@ -102,6 +105,15 @@ protected GrpcReportErrorsServiceStub(
         reportErrorEventTransportSettings =
             GrpcCallSettings.<ReportErrorEventRequest, ReportErrorEventResponse>newBuilder()
                 .setMethodDescriptor(reportErrorEventMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<ReportErrorEventRequest>() {
+                      @Override
+                      public Map<String, String> extract(ReportErrorEventRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("project_name", String.valueOf(request.getProjectName()));
+                        return params.build();
+                      }
+                    })
                 .build();
 
     this.reportErrorEventCallable =
diff --git a/google-cloud-clients/google-cloud-errorreporting/synth.metadata b/google-cloud-clients/google-cloud-errorreporting/synth.metadata
index ba0e1701952f..2bb22a6c0e2f 100644
--- a/google-cloud-clients/google-cloud-errorreporting/synth.metadata
+++ b/google-cloud-clients/google-cloud-errorreporting/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-03-06T08:42:48.951032Z",
+  "updateTime": "2019-03-28T07:44:08.505444Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.15",
-        "dockerImage": "googleapis/artman@sha256:9caadfa59d48224cba5f3217eb9d61a155b78ccf31e628abef385bc5b7ed3bd2"
+        "version": "0.16.20",
+        "dockerImage": "googleapis/artman@sha256:e3c054a2fb85a12481c722af616c7fb6f1d02d862248385eecbec3e4240ebd1e"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "856117505ff9075b3e9c0b5674113667b6cf9e00",
-        "internalRef": "236931378"
+        "sha": "6a84b3267b0a95e922608b9891219075047eee29",
+        "internalRef": "240640999"
       }
     }
   ],