docs: public Observable<Page<CloudTask>> listAsync(final String jobId, final TaskListOptions taskListOptions) {
          return listWithServiceResponseAsync(jobId, taskListOptions)
              .map(new Func1<ServiceResponseWithHeaders<Page<CloudTask>, TaskListHeaders>, Page<CloudTask>>() {
                  @Override
                  public Page<CloudTask> call(ServiceResponseWithHeaders<Page<CloudTask>, TaskListHeaders> response) {
                      return response.body();
                  }
              });
      }