XmContainerPaste(3) on Linux
The text 88f9100a2406, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Container widget function to insert items from the clipboard "XmContainerPaste" "XmContainer"