I need some help concerning Writable- and `BufferedImages` in Java (11, Javafx): 

How do I convert a `WritabeImage` to a `BufferedImage`? - WITHOUT using `SwingFXUtils.fromFXImage()`

It is important for me to find a solution without `SwingFXUtils.fromFXImage()`. I have already asked google, but the only results I am getting contain `SwingFXUtils.fromFXImage()`. So I am asking for your expertise. 

Could you please help me? 

Thanks!