XmListReplacePositions(3) on Linux
The text 829c1f9dfa31, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A List function that replaces items in a list based on position "XmListReplacePositions" "List functions" "XmListReplacePositions"