code: public Observable<Page<ImageInner>> listNextAsync(final String nextPageLink) {
          return listNextWithServiceResponseAsync(nextPageLink)
              .map(new Func1<ServiceResponse<Page<ImageInner>>, Page<ImageInner>>() {
                  @Override
                  public Page<ImageInner> call(ServiceResponse<Page<ImageInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Gets the list of Images in the subscription. Use nextLink property in the response to get the next page of Images. Do this till nextLink is null to fetch all the Images.
  
  @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;ImageInner&gt; object