diff --git a/src/main/java/com/google/api/generator/gapic/composer/BUILD.bazel b/src/main/java/com/google/api/generator/gapic/composer/BUILD.bazel
index f90d35bd99..503561e307 100644
--- a/src/main/java/com/google/api/generator/gapic/composer/BUILD.bazel
+++ b/src/main/java/com/google/api/generator/gapic/composer/BUILD.bazel
@@ -15,9 +15,11 @@ java_library(
     deps = [
         "//:service_config_java_proto",
         "//src/main/java/com/google/api/generator/engine/ast",
+        "//src/main/java/com/google/api/generator/engine/writer",
         "//src/main/java/com/google/api/generator/gapic:status_java_proto",
         "//src/main/java/com/google/api/generator/gapic/model",
         "//src/main/java/com/google/api/generator/gapic/utils",
+        "//src/main/java/com/google/api/generator/gapic/composer/samplecode",
         "@com_google_api_api_common//jar",
         "@com_google_api_gax_java//gax",
         "@com_google_api_gax_java//gax-grpc:gax_grpc",
diff --git a/src/main/java/com/google/api/generator/gapic/composer/SampleCodeHelperComposer.java b/src/main/java/com/google/api/generator/gapic/composer/SampleCodeHelperComposer.java
new file mode 100644
index 0000000000..d3d7c86967
--- /dev/null
+++ b/src/main/java/com/google/api/generator/gapic/composer/SampleCodeHelperComposer.java
@@ -0,0 +1,149 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.api.generator.gapic.composer;
+
+import com.google.api.generator.engine.ast.AssignmentExpr;
+import com.google.api.generator.engine.ast.CommentStatement;
+import com.google.api.generator.engine.ast.LineComment;
+import com.google.api.generator.engine.ast.MethodInvocationExpr;
+import com.google.api.generator.engine.ast.TryCatchStatement;
+import com.google.api.generator.engine.ast.TypeNode;
+import com.google.api.generator.engine.ast.Variable;
+import com.google.api.generator.engine.ast.VariableExpr;
+import com.google.api.generator.gapic.model.Method;
+import com.google.api.generator.gapic.model.MethodArgument;
+import com.google.api.generator.gapic.utils.JavaStyle;
+import java.util.Arrays;
+import java.util.List;
+
+public final class SampleCodeHelperComposer {
+
+  public static TryCatchStatement composeRpcMethodSampleCode(
+      Method method, List<MethodArgument> arguments, TypeNode clientType) {
+    // Default Unary RPC method.
+    if (arguments.isEmpty()) {
+      return composeUnaryRpcDefaultMethodSampleCode(method, clientType);
+    }
+    // Paged Unary RPC method.
+    if (method.isPaged()) {
+      return composePagedUnaryRpcMethodSampleCode(method, arguments, clientType);
+    }
+    // Long run operation Unary RPC method.
+    if (method.hasLro()) {
+      return composeLroUnaryRpcMethodSampleCode(method, arguments, clientType);
+    }
+    // Pure Unary RPC method.
+    return composeUnaryRpcMethodSampleCode(method, arguments, clientType);
+  }
+
+  private static TryCatchStatement composeUnaryRpcMethodSampleCode(
+      Method method, List<MethodArgument> arguments, TypeNode clientType) {
+    // TODO(summerji): compose sample code for unary rpc method.
+    return TryCatchStatement.builder()
+        .setTryResourceExpr(assignClientVariableWithCreateMethodExpr(clientType))
+        .setTryBody(
+            Arrays.asList(
+                createLineCommentStatement(
+                    "Note: Not Implement yet. Hold for pure unary rpc method sample code.")))
+        .setIsSampleCode(true)
+        .build();
+  }
+
+  private static TryCatchStatement composeLroUnaryRpcMethodSampleCode(
+      Method method, List<MethodArgument> arguments, TypeNode clientType) {
+    // TODO(summerji): compose sample code for unary lro rpc method.
+    return TryCatchStatement.builder()
+        .setTryResourceExpr(assignClientVariableWithCreateMethodExpr(clientType))
+        .setTryBody(
+            Arrays.asList(
+                createLineCommentStatement(
+                    "Note: Not Implement yet. Holder for lro Unary rpc method sample code.")))
+        .setIsSampleCode(true)
+        .build();
+  }
+
+  private static TryCatchStatement composePagedUnaryRpcMethodSampleCode(
+      Method method, List<MethodArgument> arguments, TypeNode clientType) {
+    // TODO(summerji): compose sample code for unary paged rpc method.
+    return TryCatchStatement.builder()
+        .setTryResourceExpr(assignClientVariableWithCreateMethodExpr(clientType))
+        .setTryBody(
+            Arrays.asList(
+                createLineCommentStatement(
+                    "Note: Not Implement yet. Holder for paged unary rpc method sample code.")))
+        .setIsSampleCode(true)
+        .build();
+  }
+
+  private static TryCatchStatement composeUnaryRpcDefaultMethodSampleCode(
+      Method method, TypeNode clientType) {
+    // TODO(summerji): compose sample code for unary default rpc method.
+    String content =
+        String.format(
+            "Note: Not Implement yet. Holder for unary %s rpc method sample code.",
+            (!method.hasLro() && !method.isPaged()
+                ? "default"
+                : (method.hasLro() ? "lro" : "paged")));
+    return TryCatchStatement.builder()
+        .setTryResourceExpr(assignClientVariableWithCreateMethodExpr(clientType))
+        .setTryBody(Arrays.asList(createLineCommentStatement(content)))
+        .setIsSampleCode(true)
+        .build();
+  }
+
+  // ==================================Helpers===================================================//
+
+  // Assign client variable expr with create client.
+  // e.g EchoClient echoClient = EchoClient.create()
+  private static AssignmentExpr assignClientVariableWithCreateMethodExpr(TypeNode clientType) {
+    return AssignmentExpr.builder()
+        .setVariableExpr(createVariableDeclExpr(getClientName(clientType), clientType))
+        .setValueExpr(
+            MethodInvocationExpr.builder()
+                .setStaticReferenceType(clientType)
+                .setReturnType(clientType)
+                .setMethodName("create")
+                .build())
+        .build();
+  }
+
+  private static String getClientName(TypeNode clientType) {
+    return JavaStyle.toLowerCamelCase(clientType.reference().name());
+  }
+
+  private static CommentStatement createLineCommentStatement(String content) {
+    return CommentStatement.withComment(LineComment.withComment(content));
+  }
+
+  private static VariableExpr createVariableExpr(String variableName, TypeNode type) {
+    return createVariableExpr(variableName, type, false);
+  }
+
+  private static VariableExpr createVariableDeclExpr(String variableName, TypeNode type) {
+    return createVariableExpr(variableName, type, true);
+  }
+
+  private static VariableExpr createVariableExpr(
+      String variableName, TypeNode type, boolean isDecl) {
+    return VariableExpr.builder()
+        .setVariable(createVariable(variableName, type))
+        .setIsDecl(isDecl)
+        .build();
+  }
+
+  private static Variable createVariable(String varName, TypeNode type) {
+    return Variable.builder().setName(varName).setType(type).build();
+  }
+}
diff --git a/src/main/java/com/google/api/generator/gapic/composer/ServiceClientClassComposer.java b/src/main/java/com/google/api/generator/gapic/composer/ServiceClientClassComposer.java
index 02ff960025..e136c25402 100644
--- a/src/main/java/com/google/api/generator/gapic/composer/ServiceClientClassComposer.java
+++ b/src/main/java/com/google/api/generator/gapic/composer/ServiceClientClassComposer.java
@@ -119,7 +119,10 @@ public GapicClass generate(Service service, Map<String, Message> messageTypes) {
     ClassDefinition classDef =
         ClassDefinition.builder()
             .setHeaderCommentStatements(
-                ServiceClientCommentComposer.createClassHeaderComments(service))
+                ServiceClientCommentComposer.createClassHeaderComments(
+                    service,
+                    types.get(getClientClassName(service.name())),
+                    types.get(getSettingsName(service.name()))))
             .setPackageString(pakkage)
             .setAnnotations(createClassAnnotations(types))
             .setScope(ScopeNode.PUBLIC)
@@ -154,7 +157,9 @@ private static List<MethodDefinition> createClassMethods(
     methods.addAll(createStaticCreatorMethods(service, types));
     methods.addAll(createConstructorMethods(service, types, hasLroClient));
     methods.addAll(createGetterMethods(service, types, hasLroClient));
-    methods.addAll(createServiceMethods(service, messageTypes, types));
+    methods.addAll(
+        createServiceMethods(
+            service, messageTypes, types, types.get(getClientClassName(service.name()))));
     methods.addAll(createBackgroundResourceMethods(service, types));
     return methods;
   }
@@ -466,12 +471,15 @@ private static List<MethodDefinition> createGetterMethods(
   }
 
   private static List<MethodDefinition> createServiceMethods(
-      Service service, Map<String, Message> messageTypes, Map<String, TypeNode> types) {
+      Service service,
+      Map<String, Message> messageTypes,
+      Map<String, TypeNode> types,
+      TypeNode clientType) {
     List<MethodDefinition> javaMethods = new ArrayList<>();
     for (Method method : service.methods()) {
       if (method.stream().equals(Stream.NONE)) {
-        javaMethods.addAll(createMethodVariants(method, messageTypes, types));
-        javaMethods.add(createMethodDefaultMethod(method, types));
+        javaMethods.addAll(createMethodVariants(method, messageTypes, types, clientType));
+        javaMethods.add(createMethodDefaultMethod(method, types, clientType));
       }
       if (method.hasLro()) {
         javaMethods.add(createLroCallableMethod(service.name(), method, types));
@@ -485,7 +493,10 @@ private static List<MethodDefinition> createServiceMethods(
   }
 
   private static List<MethodDefinition> createMethodVariants(
-      Method method, Map<String, Message> messageTypes, Map<String, TypeNode> types) {
+      Method method,
+      Map<String, Message> messageTypes,
+      Map<String, TypeNode> types,
+      TypeNode clientType) {
     List<MethodDefinition> javaMethods = new ArrayList<>();
     String methodName = JavaStyle.toLowerCamelCase(method.name());
     TypeNode methodInputType = method.inputType();
@@ -549,7 +560,8 @@ private static List<MethodDefinition> createMethodVariants(
       javaMethods.add(
           MethodDefinition.builder()
               .setHeaderCommentStatements(
-                  ServiceClientCommentComposer.createRpcMethodHeaderComment(method, signature))
+                  ServiceClientCommentComposer.createRpcMethodHeaderComment(
+                      method, signature, clientType))
               .setScope(ScopeNode.PUBLIC)
               .setIsFinal(true)
               .setReturnType(methodOutputType)
@@ -564,7 +576,7 @@ private static List<MethodDefinition> createMethodVariants(
   }
 
   private static MethodDefinition createMethodDefaultMethod(
-      Method method, Map<String, TypeNode> types) {
+      Method method, Map<String, TypeNode> types, TypeNode clientType) {
     String methodName = JavaStyle.toLowerCamelCase(method.name());
     TypeNode methodInputType = method.inputType();
     TypeNode methodOutputType =
@@ -608,7 +620,7 @@ private static MethodDefinition createMethodDefaultMethod(
             .build();
     return MethodDefinition.builder()
         .setHeaderCommentStatements(
-            ServiceClientCommentComposer.createRpcMethodHeaderComment(method))
+            ServiceClientCommentComposer.createRpcMethodHeaderComment(method, clientType))
         .setScope(ScopeNode.PUBLIC)
         .setIsFinal(true)
         .setReturnType(methodOutputType)
@@ -1505,6 +1517,10 @@ private static String getClientClassName(String serviceName) {
     return String.format("%sClient", serviceName);
   }
 
+  private static String getSettingsName(String serviceName) {
+    return String.format("%sSettings", serviceName);
+  }
+
   private static List<Reference> getGenericsForCallable(
       CallableMethodKind kind, Method method, Map<String, TypeNode> types) {
     if (kind.equals(CallableMethodKind.LRO)) {
diff --git a/src/main/java/com/google/api/generator/gapic/composer/ServiceClientCommentComposer.java b/src/main/java/com/google/api/generator/gapic/composer/ServiceClientCommentComposer.java
index 1a0f8f2b0f..c57b1a894a 100644
--- a/src/main/java/com/google/api/generator/gapic/composer/ServiceClientCommentComposer.java
+++ b/src/main/java/com/google/api/generator/gapic/composer/ServiceClientCommentComposer.java
@@ -29,6 +29,10 @@
 import java.util.stream.Stream;
 
 class ServiceClientCommentComposer {
+  // Name Pattern.
+  private static final String SETTINGS_NAME_PATTERN = "%sSettings";
+  private static final String CLASS_NAME_PATTERN = "%sClient";
+
   // Tokens.
   private static final String COLON = ":";
   private static final String EMPTY_STRING = "";
@@ -103,7 +107,10 @@ class ServiceClientCommentComposer {
           "Returns the OperationsClient that can be used to query the status of a long-running"
               + " operation returned by another API method call.");
 
-  static List<CommentStatement> createClassHeaderComments(Service service) {
+  static List<CommentStatement> createClassHeaderComments(
+      Service service, TypeNode clientType, TypeNode settingsType) {
+    String settingsName = JavaStyle.toLowerCamelCase(getSettingsName(service.name()));
+    String clientName = JavaStyle.toLowerCamelCase(getClientClassName(service.name()));
     JavaDocComment.Builder classHeaderJavadocBuilder = JavaDocComment.builder();
     if (service.hasDescription()) {
       classHeaderJavadocBuilder =
@@ -134,9 +141,13 @@ static List<CommentStatement> createClassHeaderComments(Service service) {
             SERVICE_DESCRIPTION_CUSTOMIZE_SUMMARY_PATTERN,
             String.format("%sSettings", JavaStyle.toUpperCamelCase(service.name()))));
     classHeaderJavadocBuilder.addParagraph(SERVICE_DESCRIPTION_CREDENTIALS_SUMMARY_STRING);
-    // TODO(summerji): Add credentials' customization sample code here.
+    classHeaderJavadocBuilder.addSampleCode(
+        ServiceClientSampleCodeComposer.composeClassHeaderCredentialsSampleCode(
+            clientType, settingsType));
     classHeaderJavadocBuilder.addParagraph(SERVICE_DESCRIPTION_ENDPOINT_SUMMARY_STRING);
-    // TODO(summerji): Add endpoint customization sample code here.
+    classHeaderJavadocBuilder.addSampleCode(
+        ServiceClientSampleCodeComposer.composeClassHeaderEndpointSampleCode(
+            clientType, settingsType));
 
     return Arrays.asList(
         CommentComposer.AUTO_GENERATED_CLASS_COMMENT,
@@ -151,7 +162,7 @@ static CommentStatement createCreateMethodStubArgComment(
   }
 
   static List<CommentStatement> createRpcMethodHeaderComment(
-      Method method, List<MethodArgument> methodArguments) {
+      Method method, List<MethodArgument> methodArguments, TypeNode clientType) {
     JavaDocComment.Builder methodJavadocBuilder = JavaDocComment.builder();
 
     if (method.hasDescription()) {
@@ -160,7 +171,9 @@ static List<CommentStatement> createRpcMethodHeaderComment(
     }
 
     methodJavadocBuilder.addParagraph(METHOD_DESCRIPTION_SAMPLE_CODE_SUMMARY_STRING);
-    // TODO(summerji): Add sample code here.
+    methodJavadocBuilder.addSampleCode(
+        ServiceClientSampleCodeComposer.composeRpcMethodHeaderSampleCode(
+            method, methodArguments, clientType));
 
     if (methodArguments.isEmpty()) {
       methodJavadocBuilder.addParam(
@@ -181,8 +194,8 @@ static List<CommentStatement> createRpcMethodHeaderComment(
         CommentStatement.withComment(methodJavadocBuilder.build()));
   }
 
-  static List<CommentStatement> createRpcMethodHeaderComment(Method method) {
-    return createRpcMethodHeaderComment(method, Collections.emptyList());
+  static List<CommentStatement> createRpcMethodHeaderComment(Method method, TypeNode clientType) {
+    return createRpcMethodHeaderComment(method, Collections.emptyList(), clientType);
   }
 
   static CommentStatement createMethodNoArgComment(String serviceName) {
@@ -254,4 +267,12 @@ private static JavaDocComment.Builder processProtobufComment(
 
     return commentBuilder;
   }
+
+  private static String getSettingsName(String serviceName) {
+    return String.format(SETTINGS_NAME_PATTERN, serviceName);
+  }
+
+  private static String getClientClassName(String serviceName) {
+    return String.format(CLASS_NAME_PATTERN, serviceName);
+  }
 }
diff --git a/src/main/java/com/google/api/generator/gapic/composer/ServiceClientSampleCodeComposer.java b/src/main/java/com/google/api/generator/gapic/composer/ServiceClientSampleCodeComposer.java
new file mode 100644
index 0000000000..838f703354
--- /dev/null
+++ b/src/main/java/com/google/api/generator/gapic/composer/ServiceClientSampleCodeComposer.java
@@ -0,0 +1,172 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.api.generator.gapic.composer;
+
+import com.google.api.gax.core.FixedCredentialsProvider;
+import com.google.api.generator.engine.ast.AssignmentExpr;
+import com.google.api.generator.engine.ast.ConcreteReference;
+import com.google.api.generator.engine.ast.Expr;
+import com.google.api.generator.engine.ast.ExprStatement;
+import com.google.api.generator.engine.ast.MethodInvocationExpr;
+import com.google.api.generator.engine.ast.Statement;
+import com.google.api.generator.engine.ast.StringObjectValue;
+import com.google.api.generator.engine.ast.TypeNode;
+import com.google.api.generator.engine.ast.ValueExpr;
+import com.google.api.generator.engine.ast.Variable;
+import com.google.api.generator.engine.ast.VariableExpr;
+import com.google.api.generator.engine.writer.JavaWriterVisitor;
+import com.google.api.generator.gapic.composer.samplecode.SampleCodeJavaFormatter;
+import com.google.api.generator.gapic.composer.samplecode.SampleCodeWriter;
+import com.google.api.generator.gapic.model.Method;
+import com.google.api.generator.gapic.model.MethodArgument;
+import com.google.api.generator.gapic.utils.JavaStyle;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class ServiceClientSampleCodeComposer {
+  // TODO(summerji): Add unit tests for ServiceClientSampleCodeComposer.
+
+  public static String composeClassHeaderCredentialsSampleCode(
+      TypeNode clientType, TypeNode settingsType) {
+    // Initialize clientSettings with builder() method.
+    // e.g. EchoSettings echoSettings =
+    // EchoSettings.newBuilder().setCredentialsProvider(FixedCredentialsProvider.create("myCredentials")).build();
+    String settingsName = JavaStyle.toLowerCamelCase(settingsType.reference().name());
+    String clientName = JavaStyle.toLowerCamelCase(clientType.reference().name());
+    VariableExpr settingsVarExpr = createVariableExpr(settingsName, settingsType);
+    MethodInvocationExpr newBuilderMethodExpr =
+        MethodInvocationExpr.builder()
+            .setStaticReferenceType(settingsType)
+            .setMethodName("newBuilder")
+            .build();
+    TypeNode fixedCredentialProvideType =
+        TypeNode.withReference(ConcreteReference.withClazz(FixedCredentialsProvider.class));
+    MethodInvocationExpr credentialArgExpr =
+        MethodInvocationExpr.builder()
+            .setStaticReferenceType(fixedCredentialProvideType)
+            .setArguments(ValueExpr.withValue(StringObjectValue.withValue("myCredentials")))
+            .setMethodName("create")
+            .build();
+    MethodInvocationExpr credentialsMethodExpr =
+        MethodInvocationExpr.builder()
+            .setExprReferenceExpr(newBuilderMethodExpr)
+            .setArguments(credentialArgExpr)
+            .setMethodName("setCredentialsProvider")
+            .build();
+    MethodInvocationExpr buildMethodExpr =
+        MethodInvocationExpr.builder()
+            .setExprReferenceExpr(credentialsMethodExpr)
+            .setReturnType(settingsType)
+            .setMethodName("build")
+            .build();
+    Expr initSettingsVarExpr =
+        AssignmentExpr.builder()
+            .setVariableExpr(settingsVarExpr.toBuilder().setIsDecl(true).build())
+            .setValueExpr(buildMethodExpr)
+            .build();
+
+    // Initialized client with create() method.
+    // e.g. EchoClient echoClient = EchoClient.create(echoSettings);
+    VariableExpr clientVarExpr = createVariableExpr(clientName, clientType);
+    MethodInvocationExpr createMethodExpr =
+        MethodInvocationExpr.builder()
+            .setStaticReferenceType(clientType)
+            .setArguments(settingsVarExpr)
+            .setMethodName("create")
+            .setReturnType(clientType)
+            .build();
+    Expr initClientVarExpr =
+        AssignmentExpr.builder()
+            .setVariableExpr(clientVarExpr.toBuilder().setIsDecl(true).build())
+            .setValueExpr(createMethodExpr)
+            .build();
+
+    return writeSampleCode(Arrays.asList(initSettingsVarExpr, initClientVarExpr));
+  }
+
+  public static String composeClassHeaderEndpointSampleCode(
+      TypeNode clientType, TypeNode settingsType) {
+    // Initialize client settings with builder() method.
+    // e.g. EchoSettings echoSettings = EchoSettings.newBuilder().setEndpoint("myEndpoint").build();
+    String settingsName = JavaStyle.toLowerCamelCase(settingsType.reference().name());
+    String clientName = JavaStyle.toLowerCamelCase(clientType.reference().name());
+    VariableExpr settingsVarExpr = createVariableExpr(settingsName, settingsType);
+    MethodInvocationExpr newBuilderMethodExpr =
+        MethodInvocationExpr.builder()
+            .setStaticReferenceType(settingsType)
+            .setMethodName("newBuilder")
+            .build();
+    MethodInvocationExpr credentialsMethodExpr =
+        MethodInvocationExpr.builder()
+            .setExprReferenceExpr(newBuilderMethodExpr)
+            .setArguments(ValueExpr.withValue(StringObjectValue.withValue("myEndpoint")))
+            .setMethodName("setEndpoint")
+            .build();
+    MethodInvocationExpr buildMethodExpr =
+        MethodInvocationExpr.builder()
+            .setExprReferenceExpr(credentialsMethodExpr)
+            .setReturnType(settingsType)
+            .setMethodName("build")
+            .build();
+
+    Expr initSettingsVarExpr =
+        AssignmentExpr.builder()
+            .setVariableExpr(settingsVarExpr.toBuilder().setIsDecl(true).build())
+            .setValueExpr(buildMethodExpr)
+            .build();
+
+    // Initialize client with create() method.
+    // e.g. EchoClient echoClient = EchoClient.create(echoSettings);
+    VariableExpr clientVarExpr = createVariableExpr(clientName, clientType);
+    MethodInvocationExpr createMethodExpr =
+        MethodInvocationExpr.builder()
+            .setStaticReferenceType(clientType)
+            .setArguments(settingsVarExpr)
+            .setMethodName("create")
+            .setReturnType(clientType)
+            .build();
+    Expr initClientVarExpr =
+        AssignmentExpr.builder()
+            .setVariableExpr(clientVarExpr.toBuilder().setIsDecl(true).build())
+            .setValueExpr(createMethodExpr)
+            .build();
+
+    return writeSampleCode(Arrays.asList(initSettingsVarExpr, initClientVarExpr));
+  }
+
+  public static String composeRpcMethodHeaderSampleCode(
+      Method method, List<MethodArgument> arguments, TypeNode clientType) {
+    return SampleCodeWriter.write(
+        SampleCodeHelperComposer.composeRpcMethodSampleCode(method, arguments, clientType));
+  }
+
+  // ======================================== Helpers ==========================================//
+  // TODO(summerji): Use writeSampleCode method in new class once PR#499 merged.
+  private static String writeSampleCode(List<Expr> exprs) {
+    List<Statement> statements =
+        exprs.stream().map(e -> ExprStatement.withExpr(e)).collect(Collectors.toList());
+    JavaWriterVisitor visitor = new JavaWriterVisitor();
+    for (Statement statement : statements) {
+      statement.accept(visitor);
+    }
+    return SampleCodeJavaFormatter.format(visitor.write());
+  }
+
+  private static VariableExpr createVariableExpr(String variableName, TypeNode type) {
+    return VariableExpr.withVariable(
+        Variable.builder().setName(variableName).setType(type).build());
+  }
+}
diff --git a/src/test/java/com/google/api/generator/gapic/composer/goldens/EchoClient.golden b/src/test/java/com/google/api/generator/gapic/composer/goldens/EchoClient.golden
index 20a193853e..0c6ba38ac9 100644
--- a/src/test/java/com/google/api/generator/gapic/composer/goldens/EchoClient.golden
+++ b/src/test/java/com/google/api/generator/gapic/composer/goldens/EchoClient.golden
@@ -63,7 +63,20 @@ import javax.annotation.Generated;
  *
  * <p>To customize credentials:
  *
+ * <pre>{@code
+ * EchoSettings echoSettings =
+ *     EchoSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create("myCredentials"))
+ *         .build();
+ * EchoClient echoClient = EchoClient.create(echoSettings);
+ * }</pre>
+ *
  * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * EchoSettings echoSettings = EchoSettings.newBuilder().setEndpoint("myEndpoint").build();
+ * EchoClient echoClient = EchoClient.create(echoSettings);
+ * }</pre>
  */
 @BetaApi
 @Generated("by gapic-generator")
@@ -132,6 +145,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -147,6 +166,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param error
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -159,6 +184,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -172,6 +203,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param content
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -184,6 +221,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -196,6 +239,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -208,6 +257,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param content
    * @param severity
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -222,6 +277,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -263,6 +324,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -287,6 +354,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param ttl
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -299,6 +372,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param end_time
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -311,6 +390,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -334,6 +419,12 @@ public class EchoClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (EchoClient echoClient = EchoClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
diff --git a/src/test/java/com/google/api/generator/gapic/composer/goldens/IdentityClient.golden b/src/test/java/com/google/api/generator/gapic/composer/goldens/IdentityClient.golden
index 0f48757f2b..9b8a9741ad 100644
--- a/src/test/java/com/google/api/generator/gapic/composer/goldens/IdentityClient.golden
+++ b/src/test/java/com/google/api/generator/gapic/composer/goldens/IdentityClient.golden
@@ -53,7 +53,21 @@ import javax.annotation.Generated;
  *
  * <p>To customize credentials:
  *
+ * <pre>{@code
+ * IdentitySettings identitySettings =
+ *     IdentitySettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create("myCredentials"))
+ *         .build();
+ * IdentityClient identityClient = IdentityClient.create(identitySettings);
+ * }</pre>
+ *
  * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * IdentitySettings identitySettings =
+ *     IdentitySettings.newBuilder().setEndpoint("myEndpoint").build();
+ * IdentityClient identityClient = IdentityClient.create(identitySettings);
+ * }</pre>
  */
 @BetaApi
 @Generated("by gapic-generator")
@@ -111,6 +125,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent
    * @param display_name
    * @param email
@@ -130,6 +150,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent
    * @param display_name
    * @param email
@@ -164,6 +190,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -181,6 +213,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -194,6 +232,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -206,6 +250,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -223,6 +273,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -240,6 +296,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -255,6 +317,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -267,6 +335,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -284,6 +358,12 @@ public class IdentityClient implements BackgroundResource {
   /**
    * Sample code:
    *
+   * <pre>{@code
+   * try (IdentityClient identityClient = IdentityClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
diff --git a/test/integration/goldens/asset/AssetServiceClient.java b/test/integration/goldens/asset/AssetServiceClient.java
index 103843b065..7250e322c3 100644
--- a/test/integration/goldens/asset/AssetServiceClient.java
+++ b/test/integration/goldens/asset/AssetServiceClient.java
@@ -75,7 +75,21 @@
  *
  * <p>To customize credentials:
  *
+ * <pre>{@code
+ * AssetServiceSettings assetServiceSettings =
+ *     AssetServiceSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create("myCredentials"))
+ *         .build();
+ * AssetServiceClient assetServiceClient = AssetServiceClient.create(assetServiceSettings);
+ * }</pre>
+ *
  * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * AssetServiceSettings assetServiceSettings =
+ *     AssetServiceSettings.newBuilder().setEndpoint("myEndpoint").build();
+ * AssetServiceClient assetServiceClient = AssetServiceClient.create(assetServiceSettings);
+ * }</pre>
  */
 @BetaApi
 @Generated("by gapic-generator")
@@ -154,6 +168,12 @@ public final OperationsClient getOperationsClient() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -207,6 +227,12 @@ public final UnaryCallable<ExportAssetsRequest, Operation> exportAssetsCallable(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -236,6 +262,12 @@ public final BatchGetAssetsHistoryResponse batchGetAssetsHistory(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The name of the project/folder/organization where this feed should be
    *     created in. It can only be an organization number (such as "organizations/123"), a folder
    *     number (such as "folders/123"), a project ID (such as "projects/my-project-id")", or a
@@ -253,6 +285,12 @@ public final Feed createFeed(String parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -276,6 +314,12 @@ public final UnaryCallable<CreateFeedRequest, Feed> createFeedCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the Feed and it must be in the format of:
    *     projects/project_number/feeds/feed_id folders/folder_number/feeds/feed_id
    *     organizations/organization_number/feeds/feed_id
@@ -293,6 +337,12 @@ public final Feed getFeed(FeedName name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the Feed and it must be in the format of:
    *     projects/project_number/feeds/feed_id folders/folder_number/feeds/feed_id
    *     organizations/organization_number/feeds/feed_id
@@ -309,6 +359,12 @@ public final Feed getFeed(String name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -332,6 +388,12 @@ public final UnaryCallable<GetFeedRequest, Feed> getFeedCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent project/folder/organization whose feeds are to be listed. It
    *     can only be using project/folder/organization number (such as "folders/12345")", or a
    *     project ID (such as "projects/my-project-id").
@@ -348,6 +410,12 @@ public final ListFeedsResponse listFeeds(String parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -371,6 +439,12 @@ public final UnaryCallable<ListFeedsRequest, ListFeedsResponse> listFeedsCallabl
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param feed Required. The new values of feed details. It must match an existing feed and the
    *     field `name` must be in the format of: projects/project_number/feeds/feed_id or
    *     folders/folder_number/feeds/feed_id or organizations/organization_number/feeds/feed_id.
@@ -387,6 +461,12 @@ public final Feed updateFeed(Feed feed) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -410,6 +490,12 @@ public final UnaryCallable<UpdateFeedRequest, Feed> updateFeedCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the feed and it must be in the format of:
    *     projects/project_number/feeds/feed_id folders/folder_number/feeds/feed_id
    *     organizations/organization_number/feeds/feed_id
@@ -429,6 +515,12 @@ public final Empty deleteFeed(FeedName name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The name of the feed and it must be in the format of:
    *     projects/project_number/feeds/feed_id folders/folder_number/feeds/feed_id
    *     organizations/organization_number/feeds/feed_id
@@ -445,6 +537,12 @@ public final Empty deleteFeed(String name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -470,6 +568,12 @@ public final UnaryCallable<DeleteFeedRequest, Empty> deleteFeedCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param scope Required. A scope can be a project, a folder, or an organization. The search is
    *     limited to the resources within the `scope`. The caller must be granted the
    *     [`cloudasset.assets.searchAllResources`](http://cloud.google.com/asset-inventory/docs/access-control#required_permissions)
@@ -538,6 +642,12 @@ public final SearchAllResourcesPagedResponse searchAllResources(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -580,6 +690,12 @@ public final SearchAllResourcesPagedResponse searchAllResources(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param scope Required. A scope can be a project, a folder, or an organization. The search is
    *     limited to the IAM policies within the `scope`. The caller must be granted the
    *     [`cloudasset.assets.searchAllIamPolicies`](http://cloud.google.com/asset-inventory/docs/access-control#required_permissions)
@@ -632,6 +748,12 @@ public final SearchAllIamPoliciesPagedResponse searchAllIamPolicies(String scope
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (AssetServiceClient assetServiceClient = AssetServiceClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
diff --git a/test/integration/goldens/logging/ConfigServiceV2Client.java b/test/integration/goldens/logging/ConfigServiceV2Client.java
index b6516172fc..e2ae38f74b 100644
--- a/test/integration/goldens/logging/ConfigServiceV2Client.java
+++ b/test/integration/goldens/logging/ConfigServiceV2Client.java
@@ -73,7 +73,23 @@
  *
  * <p>To customize credentials:
  *
+ * <pre>{@code
+ * ConfigServiceV2Settings configServiceV2Settings =
+ *     ConfigServiceV2Settings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create("myCredentials"))
+ *         .build();
+ * ConfigServiceV2Client configServiceV2Client =
+ *     ConfigServiceV2Client.create(configServiceV2Settings);
+ * }</pre>
+ *
  * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * ConfigServiceV2Settings configServiceV2Settings =
+ *     ConfigServiceV2Settings.newBuilder().setEndpoint("myEndpoint").build();
+ * ConfigServiceV2Client configServiceV2Client =
+ *     ConfigServiceV2Client.create(configServiceV2Settings);
+ * }</pre>
  */
 @BetaApi
 @Generated("by gapic-generator")
@@ -135,6 +151,12 @@ public ConfigServiceV2Stub getStub() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose buckets are to be listed:
    *     <p>"projects/[PROJECT_ID]/locations/[LOCATION_ID]"
    *     "organizations/[ORGANIZATION_ID]/locations/[LOCATION_ID]"
@@ -158,6 +180,12 @@ public final ListBucketsPagedResponse listBuckets(BillingAccountLocationName par
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose buckets are to be listed:
    *     <p>"projects/[PROJECT_ID]/locations/[LOCATION_ID]"
    *     "organizations/[ORGANIZATION_ID]/locations/[LOCATION_ID]"
@@ -181,6 +209,12 @@ public final ListBucketsPagedResponse listBuckets(FolderLocationName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose buckets are to be listed:
    *     <p>"projects/[PROJECT_ID]/locations/[LOCATION_ID]"
    *     "organizations/[ORGANIZATION_ID]/locations/[LOCATION_ID]"
@@ -204,6 +238,12 @@ public final ListBucketsPagedResponse listBuckets(LocationName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose buckets are to be listed:
    *     <p>"projects/[PROJECT_ID]/locations/[LOCATION_ID]"
    *     "organizations/[ORGANIZATION_ID]/locations/[LOCATION_ID]"
@@ -227,6 +267,12 @@ public final ListBucketsPagedResponse listBuckets(OrganizationLocationName paren
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose buckets are to be listed:
    *     <p>"projects/[PROJECT_ID]/locations/[LOCATION_ID]"
    *     "organizations/[ORGANIZATION_ID]/locations/[LOCATION_ID]"
@@ -247,6 +293,12 @@ public final ListBucketsPagedResponse listBuckets(String parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -281,6 +333,12 @@ public final UnaryCallable<ListBucketsRequest, ListBucketsResponse> listBucketsC
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -313,6 +371,12 @@ public final UnaryCallable<GetBucketRequest, LogBucket> getBucketCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -345,6 +409,12 @@ public final UnaryCallable<UpdateBucketRequest, LogBucket> updateBucketCallable(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose sinks are to be listed:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -364,6 +434,12 @@ public final ListSinksPagedResponse listSinks(BillingAccountName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose sinks are to be listed:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -383,6 +459,12 @@ public final ListSinksPagedResponse listSinks(FolderName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose sinks are to be listed:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -402,6 +484,12 @@ public final ListSinksPagedResponse listSinks(OrganizationName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose sinks are to be listed:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -421,6 +509,12 @@ public final ListSinksPagedResponse listSinks(ProjectName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose sinks are to be listed:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -437,6 +531,12 @@ public final ListSinksPagedResponse listSinks(String parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -470,6 +570,12 @@ public final UnaryCallable<ListSinksRequest, ListSinksResponse> listSinksCallabl
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param sink_name Required. The resource name of the sink:
    *     <p>"projects/[PROJECT_ID]/sinks/[SINK_ID]"
    *     "organizations/[ORGANIZATION_ID]/sinks/[SINK_ID]"
@@ -492,6 +598,12 @@ public final LogSink getSink(LogSinkName sinkName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param sink_name Required. The resource name of the sink:
    *     <p>"projects/[PROJECT_ID]/sinks/[SINK_ID]"
    *     "organizations/[ORGANIZATION_ID]/sinks/[SINK_ID]"
@@ -511,6 +623,12 @@ public final LogSink getSink(String sinkName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -537,6 +655,12 @@ public final UnaryCallable<GetSinkRequest, LogSink> getSinkCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource in which to create the sink:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -563,6 +687,12 @@ public final LogSink createSink(BillingAccountName parent, LogSink sink) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource in which to create the sink:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -589,6 +719,12 @@ public final LogSink createSink(FolderName parent, LogSink sink) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource in which to create the sink:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -615,6 +751,12 @@ public final LogSink createSink(OrganizationName parent, LogSink sink) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource in which to create the sink:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -641,6 +783,12 @@ public final LogSink createSink(ProjectName parent, LogSink sink) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource in which to create the sink:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -664,6 +812,12 @@ public final LogSink createSink(String parent, LogSink sink) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -694,6 +848,12 @@ public final UnaryCallable<CreateSinkRequest, LogSink> createSinkCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param sink_name Required. The full resource name of the sink to update, including the parent
    *     resource and the sink identifier:
    *     <p>"projects/[PROJECT_ID]/sinks/[SINK_ID]"
@@ -724,6 +884,12 @@ public final LogSink updateSink(LogSinkName sinkName, LogSink sink) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param sink_name Required. The full resource name of the sink to update, including the parent
    *     resource and the sink identifier:
    *     <p>"projects/[PROJECT_ID]/sinks/[SINK_ID]"
@@ -751,6 +917,12 @@ public final LogSink updateSink(String sinkName, LogSink sink) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param sink_name Required. The full resource name of the sink to update, including the parent
    *     resource and the sink identifier:
    *     <p>"projects/[PROJECT_ID]/sinks/[SINK_ID]"
@@ -791,6 +963,12 @@ public final LogSink updateSink(LogSinkName sinkName, LogSink sink, FieldMask up
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param sink_name Required. The full resource name of the sink to update, including the parent
    *     resource and the sink identifier:
    *     <p>"projects/[PROJECT_ID]/sinks/[SINK_ID]"
@@ -831,6 +1009,12 @@ public final LogSink updateSink(String sinkName, LogSink sink, FieldMask updateM
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -859,6 +1043,12 @@ public final UnaryCallable<UpdateSinkRequest, LogSink> updateSinkCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param sink_name Required. The full resource name of the sink to delete, including the parent
    *     resource and the sink identifier:
    *     <p>"projects/[PROJECT_ID]/sinks/[SINK_ID]"
@@ -883,6 +1073,12 @@ public final Empty deleteSink(LogSinkName sinkName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param sink_name Required. The full resource name of the sink to delete, including the parent
    *     resource and the sink identifier:
    *     <p>"projects/[PROJECT_ID]/sinks/[SINK_ID]"
@@ -904,6 +1100,12 @@ public final Empty deleteSink(String sinkName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -928,6 +1130,12 @@ public final UnaryCallable<DeleteSinkRequest, Empty> deleteSinkCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose exclusions are to be listed.
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -947,6 +1155,12 @@ public final ListExclusionsPagedResponse listExclusions(BillingAccountName paren
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose exclusions are to be listed.
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -966,6 +1180,12 @@ public final ListExclusionsPagedResponse listExclusions(FolderName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose exclusions are to be listed.
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -985,6 +1205,12 @@ public final ListExclusionsPagedResponse listExclusions(OrganizationName parent)
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose exclusions are to be listed.
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -1004,6 +1230,12 @@ public final ListExclusionsPagedResponse listExclusions(ProjectName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource whose exclusions are to be listed.
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -1020,6 +1252,12 @@ public final ListExclusionsPagedResponse listExclusions(String parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1055,6 +1293,12 @@ public final ListExclusionsPagedResponse listExclusions(ListExclusionsRequest re
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The resource name of an existing exclusion:
    *     <p>"projects/[PROJECT_ID]/exclusions/[EXCLUSION_ID]"
    *     "organizations/[ORGANIZATION_ID]/exclusions/[EXCLUSION_ID]"
@@ -1077,6 +1321,12 @@ public final LogExclusion getExclusion(LogExclusionName name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The resource name of an existing exclusion:
    *     <p>"projects/[PROJECT_ID]/exclusions/[EXCLUSION_ID]"
    *     "organizations/[ORGANIZATION_ID]/exclusions/[EXCLUSION_ID]"
@@ -1096,6 +1346,12 @@ public final LogExclusion getExclusion(String name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1120,6 +1376,12 @@ public final UnaryCallable<GetExclusionRequest, LogExclusion> getExclusionCallab
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource in which to create the exclusion:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -1144,6 +1406,12 @@ public final LogExclusion createExclusion(BillingAccountName parent, LogExclusio
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource in which to create the exclusion:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -1168,6 +1436,12 @@ public final LogExclusion createExclusion(FolderName parent, LogExclusion exclus
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource in which to create the exclusion:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -1192,6 +1466,12 @@ public final LogExclusion createExclusion(OrganizationName parent, LogExclusion
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource in which to create the exclusion:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -1216,6 +1496,12 @@ public final LogExclusion createExclusion(ProjectName parent, LogExclusion exclu
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The parent resource in which to create the exclusion:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -1237,6 +1523,12 @@ public final LogExclusion createExclusion(String parent, LogExclusion exclusion)
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1261,6 +1553,12 @@ public final UnaryCallable<CreateExclusionRequest, LogExclusion> createExclusion
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The resource name of the exclusion to update:
    *     <p>"projects/[PROJECT_ID]/exclusions/[EXCLUSION_ID]"
    *     "organizations/[ORGANIZATION_ID]/exclusions/[EXCLUSION_ID]"
@@ -1294,6 +1592,12 @@ public final LogExclusion updateExclusion(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The resource name of the exclusion to update:
    *     <p>"projects/[PROJECT_ID]/exclusions/[EXCLUSION_ID]"
    *     "organizations/[ORGANIZATION_ID]/exclusions/[EXCLUSION_ID]"
@@ -1327,6 +1631,12 @@ public final LogExclusion updateExclusion(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1350,6 +1660,12 @@ public final UnaryCallable<UpdateExclusionRequest, LogExclusion> updateExclusion
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The resource name of an existing exclusion to delete:
    *     <p>"projects/[PROJECT_ID]/exclusions/[EXCLUSION_ID]"
    *     "organizations/[ORGANIZATION_ID]/exclusions/[EXCLUSION_ID]"
@@ -1372,6 +1688,12 @@ public final Empty deleteExclusion(LogExclusionName name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. The resource name of an existing exclusion to delete:
    *     <p>"projects/[PROJECT_ID]/exclusions/[EXCLUSION_ID]"
    *     "organizations/[ORGANIZATION_ID]/exclusions/[EXCLUSION_ID]"
@@ -1391,6 +1713,12 @@ public final Empty deleteExclusion(String name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1420,6 +1748,12 @@ public final UnaryCallable<DeleteExclusionRequest, Empty> deleteExclusionCallabl
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -1460,6 +1794,12 @@ public final UnaryCallable<GetCmekSettingsRequest, CmekSettings> getCmekSettings
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (ConfigServiceV2Client configServiceV2Client = ConfigServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
diff --git a/test/integration/goldens/logging/LoggingServiceV2Client.java b/test/integration/goldens/logging/LoggingServiceV2Client.java
index d90cbfadf6..6ce1717123 100644
--- a/test/integration/goldens/logging/LoggingServiceV2Client.java
+++ b/test/integration/goldens/logging/LoggingServiceV2Client.java
@@ -75,7 +75,23 @@
  *
  * <p>To customize credentials:
  *
+ * <pre>{@code
+ * LoggingServiceV2Settings loggingServiceV2Settings =
+ *     LoggingServiceV2Settings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create("myCredentials"))
+ *         .build();
+ * LoggingServiceV2Client loggingServiceV2Client =
+ *     LoggingServiceV2Client.create(loggingServiceV2Settings);
+ * }</pre>
+ *
  * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * LoggingServiceV2Settings loggingServiceV2Settings =
+ *     LoggingServiceV2Settings.newBuilder().setEndpoint("myEndpoint").build();
+ * LoggingServiceV2Client loggingServiceV2Client =
+ *     LoggingServiceV2Client.create(loggingServiceV2Settings);
+ * }</pre>
  */
 @BetaApi
 @Generated("by gapic-generator")
@@ -139,6 +155,12 @@ public LoggingServiceV2Stub getStub() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param log_name Required. The resource name of the log to delete:
    *     <p>"projects/[PROJECT_ID]/logs/[LOG_ID]" "organizations/[ORGANIZATION_ID]/logs/[LOG_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]/logs/[LOG_ID]" "folders/[FOLDER_ID]/logs/[LOG_ID]"
@@ -163,6 +185,12 @@ public final Empty deleteLog(LogName logName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param log_name Required. The resource name of the log to delete:
    *     <p>"projects/[PROJECT_ID]/logs/[LOG_ID]" "organizations/[ORGANIZATION_ID]/logs/[LOG_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]/logs/[LOG_ID]" "folders/[FOLDER_ID]/logs/[LOG_ID]"
@@ -184,6 +212,12 @@ public final Empty deleteLog(String logName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -212,6 +246,12 @@ public final UnaryCallable<DeleteLogRequest, Empty> deleteLogCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param log_name Optional. A default log resource name that is assigned to all log entries in
    *     `entries` that do not specify a value for `log_name`:
    *     <p>"projects/[PROJECT_ID]/logs/[LOG_ID]" "organizations/[ORGANIZATION_ID]/logs/[LOG_ID]"
@@ -276,6 +316,12 @@ public final WriteLogEntriesResponse writeLogEntries(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param log_name Optional. A default log resource name that is assigned to all log entries in
    *     `entries` that do not specify a value for `log_name`:
    *     <p>"projects/[PROJECT_ID]/logs/[LOG_ID]" "organizations/[ORGANIZATION_ID]/logs/[LOG_ID]"
@@ -340,6 +386,12 @@ public final WriteLogEntriesResponse writeLogEntries(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -369,6 +421,12 @@ public final WriteLogEntriesResponse writeLogEntries(WriteLogEntriesRequest requ
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param resource_names Required. Names of one or more parent resources from which to retrieve
    *     log entries:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
@@ -406,6 +464,12 @@ public final ListLogEntriesPagedResponse listLogEntries(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -445,6 +509,12 @@ public final ListLogEntriesPagedResponse listLogEntries(ListLogEntriesRequest re
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -484,6 +554,12 @@ public final ListMonitoredResourceDescriptorsPagedResponse listMonitoredResource
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name that owns the logs:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -504,6 +580,12 @@ public final ListLogsPagedResponse listLogs(BillingAccountName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name that owns the logs:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -524,6 +606,12 @@ public final ListLogsPagedResponse listLogs(FolderName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name that owns the logs:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -544,6 +632,12 @@ public final ListLogsPagedResponse listLogs(OrganizationName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name that owns the logs:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -564,6 +658,12 @@ public final ListLogsPagedResponse listLogs(ProjectName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name that owns the logs:
    *     <p>"projects/[PROJECT_ID]" "organizations/[ORGANIZATION_ID]"
    *     "billingAccounts/[BILLING_ACCOUNT_ID]" "folders/[FOLDER_ID]"
@@ -581,6 +681,12 @@ public final ListLogsPagedResponse listLogs(String parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (LoggingServiceV2Client loggingServiceV2Client = LoggingServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
diff --git a/test/integration/goldens/logging/MetricsServiceV2Client.java b/test/integration/goldens/logging/MetricsServiceV2Client.java
index 19f6aef98d..e3d59680f4 100644
--- a/test/integration/goldens/logging/MetricsServiceV2Client.java
+++ b/test/integration/goldens/logging/MetricsServiceV2Client.java
@@ -72,7 +72,23 @@
  *
  * <p>To customize credentials:
  *
+ * <pre>{@code
+ * MetricsServiceV2Settings metricsServiceV2Settings =
+ *     MetricsServiceV2Settings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create("myCredentials"))
+ *         .build();
+ * MetricsServiceV2Client metricsServiceV2Client =
+ *     MetricsServiceV2Client.create(metricsServiceV2Settings);
+ * }</pre>
+ *
  * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * MetricsServiceV2Settings metricsServiceV2Settings =
+ *     MetricsServiceV2Settings.newBuilder().setEndpoint("myEndpoint").build();
+ * MetricsServiceV2Client metricsServiceV2Client =
+ *     MetricsServiceV2Client.create(metricsServiceV2Settings);
+ * }</pre>
  */
 @BetaApi
 @Generated("by gapic-generator")
@@ -134,6 +150,12 @@ public MetricsServiceV2Stub getStub() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The name of the project containing the metrics:
    *     <p>"projects/[PROJECT_ID]"
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -152,6 +174,12 @@ public final ListLogMetricsPagedResponse listLogMetrics(ProjectName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The name of the project containing the metrics:
    *     <p>"projects/[PROJECT_ID]"
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -167,6 +195,12 @@ public final ListLogMetricsPagedResponse listLogMetrics(String parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -202,6 +236,12 @@ public final ListLogMetricsPagedResponse listLogMetrics(ListLogMetricsRequest re
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param metric_name Required. The resource name of the desired metric:
    *     <p>"projects/[PROJECT_ID]/metrics/[METRIC_ID]"
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -220,6 +260,12 @@ public final LogMetric getLogMetric(LogMetricName metricName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param metric_name Required. The resource name of the desired metric:
    *     <p>"projects/[PROJECT_ID]/metrics/[METRIC_ID]"
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -236,6 +282,12 @@ public final LogMetric getLogMetric(String metricName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -259,6 +311,12 @@ public final UnaryCallable<GetLogMetricRequest, LogMetric> getLogMetricCallable(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project in which to create the metric:
    *     <p>"projects/[PROJECT_ID]"
    *     <p>The new metric must be provided in the request.
@@ -281,6 +339,12 @@ public final LogMetric createLogMetric(ProjectName parent, LogMetric metric) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the project in which to create the metric:
    *     <p>"projects/[PROJECT_ID]"
    *     <p>The new metric must be provided in the request.
@@ -300,6 +364,12 @@ public final LogMetric createLogMetric(String parent, LogMetric metric) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -323,6 +393,12 @@ public final UnaryCallable<CreateLogMetricRequest, LogMetric> createLogMetricCal
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param metric_name Required. The resource name of the metric to update:
    *     <p>"projects/[PROJECT_ID]/metrics/[METRIC_ID]"
    *     <p>The updated metric must be provided in the request and it's `name` field must be the
@@ -346,6 +422,12 @@ public final LogMetric updateLogMetric(LogMetricName metricName, LogMetric metri
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param metric_name Required. The resource name of the metric to update:
    *     <p>"projects/[PROJECT_ID]/metrics/[METRIC_ID]"
    *     <p>The updated metric must be provided in the request and it's `name` field must be the
@@ -366,6 +448,12 @@ public final LogMetric updateLogMetric(String metricName, LogMetric metric) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -389,6 +477,12 @@ public final UnaryCallable<UpdateLogMetricRequest, LogMetric> updateLogMetricCal
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param metric_name Required. The resource name of the metric to delete:
    *     <p>"projects/[PROJECT_ID]/metrics/[METRIC_ID]"
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -407,6 +501,12 @@ public final Empty deleteLogMetric(LogMetricName metricName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param metric_name Required. The resource name of the metric to delete:
    *     <p>"projects/[PROJECT_ID]/metrics/[METRIC_ID]"
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -423,6 +523,12 @@ public final Empty deleteLogMetric(String metricName) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (MetricsServiceV2Client metricsServiceV2Client = MetricsServiceV2Client.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
diff --git a/test/integration/goldens/redis/CloudRedisClient.java b/test/integration/goldens/redis/CloudRedisClient.java
index c807b6dd8a..abca20f3ca 100644
--- a/test/integration/goldens/redis/CloudRedisClient.java
+++ b/test/integration/goldens/redis/CloudRedisClient.java
@@ -95,7 +95,21 @@
  *
  * <p>To customize credentials:
  *
+ * <pre>{@code
+ * CloudRedisSettings cloudRedisSettings =
+ *     CloudRedisSettings.newBuilder()
+ *         .setCredentialsProvider(FixedCredentialsProvider.create("myCredentials"))
+ *         .build();
+ * CloudRedisClient cloudRedisClient = CloudRedisClient.create(cloudRedisSettings);
+ * }</pre>
+ *
  * <p>To customize the endpoint:
+ *
+ * <pre>{@code
+ * CloudRedisSettings cloudRedisSettings =
+ *     CloudRedisSettings.newBuilder().setEndpoint("myEndpoint").build();
+ * CloudRedisClient cloudRedisClient = CloudRedisClient.create(cloudRedisSettings);
+ * }</pre>
  */
 @BetaApi
 @Generated("by gapic-generator")
@@ -176,6 +190,12 @@ public final OperationsClient getOperationsClient() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the instance location using the form:
    *     `projects/{project_id}/locations/{location_id}` where `location_id` refers to a GCP region.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -204,6 +224,12 @@ public final ListInstancesPagedResponse listInstances(LocationName parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for paged unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the instance location using the form:
    *     `projects/{project_id}/locations/{location_id}` where `location_id` refers to a GCP region.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
@@ -229,6 +255,12 @@ public final ListInstancesPagedResponse listInstances(String parent) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary paged rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -283,6 +315,12 @@ public final UnaryCallable<ListInstancesRequest, ListInstancesResponse> listInst
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -302,6 +340,12 @@ public final Instance getInstance(InstanceName name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Hold for pure unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -318,6 +362,12 @@ public final Instance getInstance(String name) {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary default rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -352,6 +402,12 @@ public final UnaryCallable<GetInstanceRequest, Instance> getInstanceCallable() {
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the instance location using the form:
    *     `projects/{project_id}/locations/{location_id}` where `location_id` refers to a GCP region.
    * @param instance_id Required. The logical name of the Redis instance in the customer project
@@ -395,6 +451,12 @@ public final OperationFuture<Instance, OperationMetadata> createInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param parent Required. The resource name of the instance location using the form:
    *     `projects/{project_id}/locations/{location_id}` where `location_id` refers to a GCP region.
    * @param instance_id Required. The logical name of the Redis instance in the customer project
@@ -438,6 +500,12 @@ public final OperationFuture<Instance, OperationMetadata> createInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -499,6 +567,12 @@ public final UnaryCallable<CreateInstanceRequest, Operation> createInstanceCalla
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param update_mask Required. Mask of fields to update. At least one path must be supplied in
    *     this field. The elements of the repeated paths field may only include these fields from
    *     [Instance][google.cloud.redis.v1.Instance]:
@@ -523,6 +597,12 @@ public final OperationFuture<Instance, OperationMetadata> updateInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -566,6 +646,12 @@ public final UnaryCallable<UpdateInstanceRequest, Operation> updateInstanceCalla
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -588,6 +674,12 @@ public final OperationFuture<Instance, OperationMetadata> upgradeInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -607,6 +699,12 @@ public final OperationFuture<Instance, OperationMetadata> upgradeInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -648,6 +746,12 @@ public final UnaryCallable<UpgradeInstanceRequest, Operation> upgradeInstanceCal
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -673,6 +777,12 @@ public final OperationFuture<Instance, OperationMetadata> importInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -725,6 +835,12 @@ public final UnaryCallable<ImportInstanceRequest, Operation> importInstanceCalla
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -749,6 +865,12 @@ public final OperationFuture<Instance, OperationMetadata> exportInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -795,6 +917,12 @@ public final UnaryCallable<ExportInstanceRequest, Operation> exportInstanceCalla
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -819,6 +947,12 @@ public final OperationFuture<Instance, OperationMetadata> failoverInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -843,6 +977,12 @@ public final OperationFuture<Instance, OperationMetadata> failoverInstanceAsync(
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */
@@ -880,6 +1020,12 @@ public final UnaryCallable<FailoverInstanceRequest, Operation> failoverInstanceC
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -899,6 +1045,12 @@ public final OperationFuture<Empty, OperationMetadata> deleteInstanceAsync(Insta
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for lro Unary rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param name Required. Redis instance resource name using the form:
    *     `projects/{project_id}/locations/{location_id}/instances/{instance_id}` where `location_id`
    *     refers to a GCP region.
@@ -915,6 +1067,12 @@ public final OperationFuture<Empty, OperationMetadata> deleteInstanceAsync(Strin
    *
    * <p>Sample code:
    *
+   * <pre>{@code
+   * try (CloudRedisClient cloudRedisClient = CloudRedisClient.create()) {
+   *   // Note: Not Implement yet. Holder for unary lro rpc method sample code.
+   * }
+   * }</pre>
+   *
    * @param request The request object containing all of the parameters for the API call.
    * @throws com.google.api.gax.rpc.ApiException if the remote call fails
    */