private void buildPartial0(com.google.cloud.tasks.v2beta2.AppEngineRouting result) {
      int from_bitField0_ = bitField0_;
      if (((from_bitField0_ & 0x00000001) != 0)) {
        result.service_ = service_;
      }
      if (((from_bitField0_ & 0x00000002) != 0)) {
        result.version_ = version_;
      }
      if (((from_bitField0_ & 0x00000004) != 0)) {
        result.instance_ = instance_;
      }
      if (((from_bitField0_ & 0x00000008) != 0)) {
        result.host_ = host_;
      }
    }
<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.v2beta2.AppEngineRouting}
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/AppEngineRouting.java