systemd-xdg-autostart-generator — User unit generator for XDG autostart files
/usr/lib/systemd/user-generators/systemd-xdg-autostart-generator
systemd-xdg-autostart-generator is a generator
    that creates .service units for
    XDG autostart
    files.
    This permits desktop environments to delegate startup of these applications to
    systemd(1)
    .
Units created by systemd-xdg-autostart-generator
    can be started by the desktop environment using "xdg-desktop-autostart.target".
    See
    systemd.special(7)
    for more details.
systemd-xdg-autostart-generator implements
    systemd.generator(7).