@Override
  public UnaryCallable<CreateCustomClassRequest, CustomClass> createCustomClassCallable() {
    return createCustomClassCallable;
  }
Constructs an instance of GrpcAdaptationStub, 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-speech/google-cloud-speech/src/main/java/com/google/cloud/speech/v1p1beta1/stub/GrpcAdaptationStub.java