This directory may contain code that can be copy-pasted, and then
adapted into your own custom widgets.

The file gtk3.rb is specifically used for ruby-gtk3 support in
these widgets. The code here is trying to make copy-pasting and
quick prototyping simpler.

Since as of September 2022 ruby-gtk4 is supported as well, and
a corresponding prototype file has been added into this directory.

Note that the idea behind unified_gtk_prototype.rb is to 
support all of ruby-gtk2, ruby-gtk3 and ruby-gtk4 in one .rb
file. This may not work very well right now, but in the future
it will hopefully work better.
