treectrl(n) on macOS
The text b00603172a82, as Mac OS X 10.4.2, Mac OS X 10.4.1, Mac OS X 10.4 shipped it.
Create and manipulate hierarchical multicolumn widgets
Flags it lists
-
-background -
-borderwidth -
-cursor -
-font -
-foreground -
-highlightbackground -
-highlightcolor -
-highlightthickness -
-orient -
-relief -
-takefocus -
-xscrollcommand -
-yscrollcommand