@Override
  public UnaryCallable<ListHcxActivationKeysRequest, ListHcxActivationKeysResponse>
      listHcxActivationKeysCallable() {
    return listHcxActivationKeysCallable;
  }
Constructs an instance of HttpJsonVmwareEngineStub, using the given settings. This is protected
so that it is easy to make a subclass, but otherwise, the static factory methods should be
preferred.
java-vmwareengine/google-cloud-vmwareengine/src/main/java/com/google/cloud/vmwareengine/v1/stub/HttpJsonVmwareEngineStub.java