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