code: public Observable<OperationStatus> updateSettingsAsync(UUID appId, UpdateSettingsOptionalParameter updateSettingsOptionalParameter) {
          return updateSettingsWithServiceResponseAsync(appId, updateSettingsOptionalParameter).map(new Func1<ServiceResponse<OperationStatus>, OperationStatus>() {
              @Override
              public OperationStatus call(ServiceResponse<OperationStatus> response) {
                  return response.body();
              }
          });
      }
docs: Updates the application settings.
  
  @param appId The application ID.
  @param updateSettingsOptionalParameter the object representing the optional parameters to be set before calling this API
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the OperationStatus object