docs: public Observable<ServiceResponse<Page<UpgradeOperationHistoricalStatusInfoInner>>> getOSUpgradeHistoryNextWithServiceResponseAsync(final String nextPageLink) {
          return getOSUpgradeHistoryNextSinglePageAsync(nextPageLink)
              .concatMap(new Func1<ServiceResponse<Page<UpgradeOperationHistoricalStatusInfoInner>>, Observable<ServiceResponse<Page<UpgradeOperationHistoricalStatusInfoInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<UpgradeOperationHistoricalStatusInfoInner>>> call(ServiceResponse<Page<UpgradeOperationHistoricalStatusInfoInner>> page) {
                      String nextPageLink = page.body().nextPageLink();
                      if (nextPageLink == null) {
                          return Observable.just(page);
                      }
                      return Observable.just(page).concatWith(getOSUpgradeHistoryNextWithServiceResponseAsync(nextPageLink));
                  }
              });
      }