code: public ImageList update(String listId, String contentType, BodyModel bodyParameter) {
          return updateWithServiceResponseAsync(listId, contentType, bodyParameter).toBlocking().single().body();
      }
docs: Updates an image list with list Id equal to list Id passed.
  
  @param listId List Id of the image list.
  @param contentType The content type.
  @param bodyParameter Schema of the body.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws APIErrorException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the ImageList object if successful.