Emitted when the session manager is about to end the session.
This signal is only emitted if [property@Gtk.Application:register-session]
is TRUE. Applications can connect to this signal and call
[method@Gtk.Application.inhibit] with GTK_APPLICATION_INHIBIT_LOGOUT
to delay the end of the session until state has been saved.
Emitted when the session manager is about to end the session.
This signal is only emitted if [property@Gtk.Application:register-session] is TRUE. Applications can connect to this signal and call [method@Gtk.Application.inhibit] with GTK_APPLICATION_INHIBIT_LOGOUT to delay the end of the session until state has been saved.