public Builder setAppEngineHttpQueue(
        com.google.cloud.tasks.v2beta3.AppEngineHttpQueue.Builder builderForValue) {
      if (appEngineHttpQueueBuilder_ == null) {
        queueType_ = builderForValue.build();
        onChanged();
      } else {
        appEngineHttpQueueBuilder_.setMessage(builderForValue.build());
      }
      queueTypeCase_ = 3;
      return this;
    }
<pre>
[AppEngineHttpQueue][google.cloud.tasks.v2beta3.AppEngineHttpQueue]
settings apply only to [App Engine
tasks][google.cloud.tasks.v2beta3.AppEngineHttpRequest] in this queue.
[Http tasks][google.cloud.tasks.v2beta3.HttpRequest] are not affected by
this proto.
</pre>

<code>.google.cloud.tasks.v2beta3.AppEngineHttpQueue app_engine_http_queue = 3;</code>
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/Queue.java