public Builder setAppEngineHttpTarget(
        com.google.cloud.tasks.v2beta2.AppEngineHttpTarget.Builder builderForValue) {
      if (appEngineHttpTargetBuilder_ == null) {
        targetType_ = builderForValue.build();
        onChanged();
      } else {
        appEngineHttpTargetBuilder_.setMessage(builderForValue.build());
      }
      targetTypeCase_ = 3;
      return this;
    }
<pre>
App Engine HTTP target.

An App Engine queue is a queue that has an
[AppEngineHttpTarget][google.cloud.tasks.v2beta2.AppEngineHttpTarget].
</pre>

<code>.google.cloud.tasks.v2beta2.AppEngineHttpTarget app_engine_http_target = 3;</code>
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/Queue.java