XmRedisplayWidget(3) on Linux
The text a731cf857415, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Synchronously activates the expose method of a widget to draw its content