XmTrackingLocate(3) on Linux
The text 09c6558214d1, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A Toolkit function that provides a modal interaction "XmTrackingLocate" "Toolkit functions" "XmTrackingLocate"