public Builder mergeQueue(com.google.cloud.tasks.v2beta2.Queue value) {
      if (queueBuilder_ == null) {
        if (((bitField0_ & 0x00000001) != 0)
            && queue_ != null
            && queue_ != com.google.cloud.tasks.v2beta2.Queue.getDefaultInstance()) {
          getQueueBuilder().mergeFrom(value);
        } else {
          queue_ = value;
        }
      } else {
        queueBuilder_.mergeFrom(value);
      }
      if (queue_ != null) {
        bitField0_ |= 0x00000001;
        onChanged();
      }
      return this;
    }
<pre>
Required. The queue to create or update.

The queue's [name][google.cloud.tasks.v2beta2.Queue.name] must be
specified.

Output only fields cannot be modified using UpdateQueue.
Any value specified for an output only field will be ignored.
The queue's [name][google.cloud.tasks.v2beta2.Queue.name] cannot be
changed.
</pre>

<code>.google.cloud.tasks.v2beta2.Queue queue = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/UpdateQueueRequest.java