XmCreateToggleButton(3) on Linux
The text 9f36916c0e22, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
The ToggleButton widget creation function "XmCreateToggleButton" "creation functions" "XmCreateToggleButton"