XmToggleButtonSetState(3) on Linux
The text 9db126489afa, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A ToggleButton function that sets or changes the current state "XmToggleButtonSetState" "ToggleButton functions" "XmToggleButtonSetState"