code: public PagedList<EventHubConsumerGroupInfoInner> listEventHubConsumerGroupsNext(final String nextPageLink) {
          ServiceResponse<Page<EventHubConsumerGroupInfoInner>> response = listEventHubConsumerGroupsNextSinglePageAsync(nextPageLink).toBlocking().single();
          return new PagedList<EventHubConsumerGroupInfoInner>(response.body()) {
              @Override
              public Page<EventHubConsumerGroupInfoInner> nextPage(String nextPageLink) {
                  return listEventHubConsumerGroupsNextSinglePageAsync(nextPageLink).toBlocking().single().body();
              }
          };
      }
docs: Get a list of the consumer groups in the Event Hub-compatible device-to-cloud endpoint in an IoT hub.
  Get a list of the consumer groups in the Event Hub-compatible device-to-cloud endpoint in an IoT hub.
  
  @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;EventHubConsumerGroupInfoInner&gt; object if successful.