XmTransferValue(3) on Linux
The text 0df12c035df9, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A toolkit function that transfers data to a destination "XmTransferValue" "toolkit functions" "XmTransferValue"