Hey jules, just checking that you’re not going to forget to update the docs since the changearound of the messaging system used by the basic components? 
there are a few errors lurking around in there [e.g. the ComboBox still has a ‘see also’ for ActionListener, which is no longer relevant, the Slider is apparently a ChangeBroadcaster, etc]
the tutorial points the reader to the docs to test them to find things out for themselves at times, and it’d be a bit of a pain for them if they were to read confusing things like that! 