XmVaCreateManagedArrowButton(3) on Linux
The text 9754cfd1e6ea, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A ArrowButton widget convenience creation functions. "XmVaCreateArrowButton" "XmVaCreateManagedArrowButton" "creation functions"