code: public Observable<ImageList> createAsync(String contentType, BodyModel bodyParameter) {
          return createWithServiceResponseAsync(contentType, bodyParameter).map(new Func1<ServiceResponse<ImageList>, ImageList>() {
              @Override
              public ImageList call(ServiceResponse<ImageList> response) {
                  return response.body();
              }
          });
      }
docs: Creates an image list.
  
  @param contentType The content type.
  @param bodyParameter Schema of the body.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ImageList object