code: public Observable<ApplicationSettings> getSettingsAsync(UUID appId) {
          return getSettingsWithServiceResponseAsync(appId).map(new Func1<ServiceResponse<ApplicationSettings>, ApplicationSettings>() {
              @Override
              public ApplicationSettings call(ServiceResponse<ApplicationSettings> response) {
                  return response.body();
              }
          });
      }
docs: Get the application settings.
  
  @param appId The application ID.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ApplicationSettings object