code: public Observable<Page<WorkloadItemResourceInner>> listNextAsync(final String nextPageLink) {
          return listNextWithServiceResponseAsync(nextPageLink)
              .map(new Func1<ServiceResponse<Page<WorkloadItemResourceInner>>, Page<WorkloadItemResourceInner>>() {
                  @Override
                  public Page<WorkloadItemResourceInner> call(ServiceResponse<Page<WorkloadItemResourceInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Provides a pageable list of workload item of a specific container according to the query filter and the pagination parameters.
  
  @param nextPageLink The NextLink from the previous successful call to List operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;WorkloadItemResourceInner&gt; object