docs: public PagedList<AppServiceCertificateResourceInner> listCertificatesNext(final String nextPageLink) {
          ServiceResponse<Page<AppServiceCertificateResourceInner>> response = listCertificatesNextSinglePageAsync(nextPageLink).toBlocking().single();
          return new PagedList<AppServiceCertificateResourceInner>(response.body()) {
              @Override
              public Page<AppServiceCertificateResourceInner> nextPage(String nextPageLink) {
                  return listCertificatesNextSinglePageAsync(nextPageLink).toBlocking().single().body();
              }
          };
      }