code: public Observable<UUID> addAsync(ApplicationCreateObject applicationCreateObject) {
          return addWithServiceResponseAsync(applicationCreateObject).map(new Func1<ServiceResponse<UUID>, UUID>() {
              @Override
              public UUID call(ServiceResponse<UUID> response) {
                  return response.body();
              }
          });
      }
docs: Creates a new LUIS app.
  
  @param applicationCreateObject A model containing Name, Description (optional), Culture, Usage Scenario (optional), Domain (optional) and initial version ID (optional) of the application. Default value for the version ID is 0.1. Note: the culture cannot be changed after the app is created.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the UUID object