XmTransferStartRequest(3) on Linux
The text ed4ce8b1e456, 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 begins a MULTIPLE transfer "XmTransferStartRequest" "toolkit functions" "XmTransferStartRequest"