XmVaCreateManagedToggleButton(3) on Linux
The text 642c6c473fa5, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A ToggleButton widget convenience creation functions. "XmVaCreateToggleToggleButton" "XmVaCreateManagedToggleButton" "creation functions" "XmVaCreateToggleButton"