code: public PagedList<SharedAccessSignatureAuthorizationRuleInner> listKeysNext(final String nextPageLink) {
          ServiceResponse<Page<SharedAccessSignatureAuthorizationRuleInner>> response = listKeysNextSinglePageAsync(nextPageLink).toBlocking().single();
          return new PagedList<SharedAccessSignatureAuthorizationRuleInner>(response.body()) {
              @Override
              public Page<SharedAccessSignatureAuthorizationRuleInner> nextPage(String nextPageLink) {
                  return listKeysNextSinglePageAsync(nextPageLink).toBlocking().single().body();
              }
          };
      }
docs: Get the security metadata for an IoT hub. For more information, see: https://docs.microsoft.com/azure/iot-hub/iot-hub-devguide-security.
  Get the security metadata for an IoT hub. For more information, see: https://docs.microsoft.com/azure/iot-hub/iot-hub-devguide-security.
  
  @param nextPageLink The NextLink from the previous successful call to List operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws ErrorDetailsException 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;SharedAccessSignatureAuthorizationRuleInner&gt; object if successful.