treectrl(3tk) on Linux
The text 45113d0a6a18, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
Create and manipulate hierarchical multicolumn widgets
Flags it lists
-
-background -
-borderwidth -
-cursor -
-font -
-foreground -
-highlightbackground -
-highlightcolor -
-highlightthickness -
-orient -
-relief -
-takefocus -
-xscrollcommand -
-yscrollcommand