@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (((bitField0_ & 0x00000001) != 0)) {
      output.writeMessage(1, getQueue());
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      output.writeMessage(2, getUpdateMask());
    }
    getUnknownFields().writeTo(output);
  }
<pre>
A mask used to specify which fields of the queue are being updated.

If empty, then all fields will be updated.
</pre>

<code>.google.protobuf.FieldMask update_mask = 2;</code>
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/UpdateQueueRequest.java