XmTextEnableRedisplay(3) on Linux
The text f1a2d39416e5, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A Text function that forces the visual update of a Text widget "XmTextEnableRedisplay" "Text functions" "XmTextEnableRedisplay"