code: public Image addImageUrlInput(String listId, String contentType, BodyModelModel imageUrl, AddImageUrlInputOptionalParameter addImageUrlInputOptionalParameter) {
          return addImageUrlInputWithServiceResponseAsync(listId, contentType, imageUrl, addImageUrlInputOptionalParameter).toBlocking().single().body();
      }
docs: Add an image to the list with list Id equal to list Id passed.
  
  @param listId List Id of the image list.
  @param contentType The content type.
  @param imageUrl The image url.
  @param addImageUrlInputOptionalParameter the object representing the optional parameters to be set before calling this API
  @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 Image object if successful.