public Builder mergeFrom(com.google.cloud.tasks.v2beta3.AppEngineRouting other) {
      if (other == com.google.cloud.tasks.v2beta3.AppEngineRouting.getDefaultInstance())
        return this;
      if (!other.getService().isEmpty()) {
        service_ = other.service_;
        bitField0_ |= 0x00000001;
        onChanged();
      }
      if (!other.getVersion().isEmpty()) {
        version_ = other.version_;
        bitField0_ |= 0x00000002;
        onChanged();
      }
      if (!other.getInstance().isEmpty()) {
        instance_ = other.instance_;
        bitField0_ |= 0x00000004;
        onChanged();
      }
      if (!other.getHost().isEmpty()) {
        host_ = other.host_;
        bitField0_ |= 0x00000008;
        onChanged();
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<pre>
App Engine Routing.

Defines routing characteristics specific to App Engine - service, version,
and instance.

For more information about services, versions, and instances see
[An Overview of App
Engine](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine),
[Microservices Architecture on Google App
Engine](https://cloud.google.com/appengine/docs/python/microservices-on-app-engine),
[App Engine Standard request
routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed),
and [App Engine Flex request
routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
</pre>

Protobuf type {@code google.cloud.tasks.v2beta3.AppEngineRouting}
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/AppEngineRouting.java