code: public PagedList<CertificateIssuerItem> getCertificateIssuers(final String vaultBaseUrl, final Integer maxresults) {
          ServiceResponse<Page<CertificateIssuerItem>> response = getCertificateIssuersSinglePageAsync(vaultBaseUrl, maxresults).toBlocking().single();
          return new PagedList<CertificateIssuerItem>(response.body()) {
              @Override
              public Page<CertificateIssuerItem> nextPage(String nextPageLink) {
                  return getCertificateIssuersNextSinglePageAsync(nextPageLink).toBlocking().single().body();
              }
          };
      }
docs: List certificate issuers for a specified key vault.
  The GetCertificateIssuers operation returns the set of certificate issuer resources in the specified key vault. This operation requires the certificates/manageissuers/getissuers permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @param maxresults Maximum number of results to return in a page. If not specified the service will return up to 25 results.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws KeyVaultErrorException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the PagedList&lt;CertificateIssuerItem&gt; object if successful.