XmRemoveFromPostFromList(3) on Linux
The text 69798e224cfb, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
a RowColumn function that disables a menu for a particular widget "XmRemoveFromPostFromList" "RowColumn functions" "XmRemoveFromPostFromList"