XmFontListInitFontContext(3) on Linux
The text 026ec219548a, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A font list function that allows applications to access the entries in a font list "XmFontListInitFontContext" "font list functions" "XmFontListInitFontContext"