XmRepTypeRegister(3) on Linux
The text 1c792f22501e, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A representation type manager function that registers a representation type resource "XmRepTypeRegister" "representation type manager functions" "XmRepTypeRegister"