docs: public Observable<OperationStatusResponseInner> getOperationStatusAsync(String userName, String operationUrl) {
          return getOperationStatusWithServiceResponseAsync(userName, operationUrl).map(new Func1<ServiceResponse<OperationStatusResponseInner>, OperationStatusResponseInner>() {
              @Override
              public OperationStatusResponseInner call(ServiceResponse<OperationStatusResponseInner> response) {
                  return response.body();
              }
          });
      }