public com.google.protobuf.FieldMask.Builder getUpdateMaskBuilder() {
      bitField0_ |= 0x00000002;
      onChanged();
      return getUpdateMaskFieldBuilder().getBuilder();
    }
<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