Resolved commments and added a changelog.

Author: Quanzzzz

.changes/next-release/bugfix-AWSSDKforJavav2DynamoDBEnhancedClient-6f19e6f.json

@@ -0,0 +1,5 @@
+{
+    "category": "AWS SDK for Java v2 DynamoDB Enhanced Client", 
+    "type": "bugfix", 
+    "description": "Added ClientRequestToken in class TransactWriteItemsEnhancedRequest."
+}

services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/model/TransactWriteItemsEnhancedRequest.java

@@ -52,7 +52,7 @@ public final class TransactWriteItemsEnhancedRequest {
 
     private final List<TransactWriteItem> transactWriteItems;
 
-    private String clientRequestToken;
+    private final String clientRequestToken;
 
     private TransactWriteItemsEnhancedRequest(Builder builder) {
         this.transactWriteItems = getItemsFromSupplier(builder.itemSupplierList);
@@ -107,7 +107,7 @@ public int hashCode() {
     public static final class Builder {
         private List<Supplier<TransactWriteItem>> itemSupplierList = new ArrayList<>();
 
-        private String clientRequestToken = null;
+        private String clientRequestToken;
 
         private Builder() {
         }

services-custom/dynamodb-enhanced/src/test/java/software/amazon/awssdk/enhanced/dynamodb/model/TransactWriteItemsEnhancedRequestTest.java

@@ -175,7 +175,7 @@ public void builder_maximal_builder_style() {
     }
 
     @Test
-    public void setClientRequestTokenTest() {
+    public void builder_passRequestToken_shouldWork() {
         String token = UUID.randomUUID().toString();
         TransactWriteItemsEnhancedRequest enhancedRequest = TransactWriteItemsEnhancedRequest.builder()
                                                                                              .clientRequestToken(token)