public Builder mergeAppEngineRouting(com.google.cloud.tasks.v2beta3.AppEngineRouting value) {
      if (appEngineRoutingBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && appEngineRouting_ != null
            && appEngineRouting_
                != com.google.cloud.tasks.v2beta3.AppEngineRouting.getDefaultInstance()) {
          getAppEngineRoutingBuilder().mergeFrom(value);
        } else {
          appEngineRouting_ = value;
        }
      } else {
        appEngineRoutingBuilder_.mergeFrom(value);
      }
      if (appEngineRouting_ != null) {
        bitField0_ |= 0x00000002;
        onChanged();
      }
      return this;
    }
<pre>
Task-level setting for App Engine routing.

If set,
[app_engine_routing_override][google.cloud.tasks.v2beta3.AppEngineHttpQueue.app_engine_routing_override]
is used for all tasks in the queue, no matter what the setting is for the
[task-level
app_engine_routing][google.cloud.tasks.v2beta3.AppEngineHttpRequest.app_engine_routing].
</pre>

<code>.google.cloud.tasks.v2beta3.AppEngineRouting app_engine_routing = 2;</code>
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/AppEngineHttpRequest.java