docs: public Observable<OperationStatusResponseInner> beginRestartAsync(String resourceGroupName, String vmScaleSetName) {
          return beginRestartWithServiceResponseAsync(resourceGroupName, vmScaleSetName).map(new Func1<ServiceResponse<OperationStatusResponseInner>, OperationStatusResponseInner>() {
              @Override
              public OperationStatusResponseInner call(ServiceResponse<OperationStatusResponseInner> response) {
                  return response.body();
              }
          });
      }