docs: public Observable<Page<JobTargetGroupInner>> listByAgentNextAsync(final String nextPageLink) {
          return listByAgentNextWithServiceResponseAsync(nextPageLink)
              .map(new Func1<ServiceResponse<Page<JobTargetGroupInner>>, Page<JobTargetGroupInner>>() {
                  @Override
                  public Page<JobTargetGroupInner> call(ServiceResponse<Page<JobTargetGroupInner>> response) {
                      return response.body();
                  }
              });
      }