public Builder clearQueue() {
      bitField0_ = (bitField0_ & ~0x00000001);
      queue_ = null;
      if (queueBuilder_ != null) {
        queueBuilder_.dispose();
        queueBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Required. The queue to create or update.

The queue's [name][google.cloud.tasks.v2beta3.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.v2beta3.Queue.name] cannot be
changed.
</pre>

<code>.google.cloud.tasks.v2beta3.Queue queue = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/UpdateQueueRequest.java