XmImSetValues(3) on Linux
The text a4c2bd26a9ef, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
An input manager function that updates attributes of an input context "XmImSetValues" "input manager functions" "XmImSetValues"