docs: public ServiceFuture<List<AppServiceCertificateResourceInner>> listCertificatesNextAsync(final String nextPageLink, final ServiceFuture<List<AppServiceCertificateResourceInner>> serviceFuture, final ListOperationCallback<AppServiceCertificateResourceInner> serviceCallback) {
          return AzureServiceFuture.fromPageResponse(
              listCertificatesNextSinglePageAsync(nextPageLink),
              new Func1<String, Observable<ServiceResponse<Page<AppServiceCertificateResourceInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<AppServiceCertificateResourceInner>>> call(String nextPageLink) {
                      return listCertificatesNextSinglePageAsync(nextPageLink);
                  }
              },
              serviceCallback);
      }