XmFontListFreeFontContext(3) on Linux
The text 0d42e5fbefe8, 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 instructs the toolkit that the font list context is no longer needed "XmFontListFreeFontContext" "font list functions" "XmFontListFreeFontContext"