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digitalmars.D.learn - Blog Post #67 - Expander

Today's post covers the Expander, a widget that... well... 
expands to reveal things hidden within. It's not quite a 
TreeView, but it's also a lot easier to use. You can read all 
about it here: 
https://gtkdcoding.com/2019/09/03/0067-mvc-xii-expander.html
Sep 03 2019