ApplicationShell(3) on Linux
The text 7932ffba4774, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
The ApplicationShell widget class "ApplicationShell" "widget class" "ApplicationShell"