code: public Observable<List<ImageList>> getAllImageListsAsync() {
          return getAllImageListsWithServiceResponseAsync().map(new Func1<ServiceResponse<List<ImageList>>, List<ImageList>>() {
              @Override
              public List<ImageList> call(ServiceResponse<List<ImageList>> response) {
                  return response.body();
              }
          });
      }
docs: Gets all the Image Lists.
  
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the List&lt;ImageList&gt; object