docs: public Observable<ServerInner> beginCreateOrUpdateAsync(String resourceGroupName, String serverName, ServerInner parameters) {
          return beginCreateOrUpdateWithServiceResponseAsync(resourceGroupName, serverName, parameters).map(new Func1<ServiceResponse<ServerInner>, ServerInner>() {
              @Override
              public ServerInner call(ServiceResponse<ServerInner> response) {
                  return response.body();
              }
          });
      }