docs: public Observable<SignalRResourceInner> updateAsync(String resourceGroupName, String resourceName) {
          return updateWithServiceResponseAsync(resourceGroupName, resourceName).map(new Func1<ServiceResponse<SignalRResourceInner>, SignalRResourceInner>() {
              @Override
              public SignalRResourceInner call(ServiceResponse<SignalRResourceInner> response) {
                  return response.body();
              }
          });
      }