XmVaCreateFileSelectionBox(3) on Linux
The text a169bed57396, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A FileSelectionBox widget convenience creation functions. "XmVaCreateFileSelectionBox" "XmVaCreateManagedFileSelectionBox" "creation functions"