@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, name_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(requestId_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, requestId_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
Optional. The request ID must be a valid UUID with the exception that zero
UUID is not supported (00000000-0000-0000-0000-000000000000).
</pre>

<code>string request_id = 2 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for requestId.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/DeleteClusterRequest.java