XmDeactivateWMProtocol(3) on Linux
The text 0847620e201f, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A VendorShell convenience interface that deactivates a protocol without removing it "protocols" "XmDeactivateWMProtocol" "VendorShell functions" "XmDeactivateWMProtocol"