gtk:application-register-session (object)

object -- a gtk:application instance
setting -- a boolean whether to register with the session manager

The accessor for the register-session slot gets or sets whether to register with the session manager. Set this property to true to register with the session mananger. This will make GTK track the session state, such as the screensaver-active property. This function is deprecated since 4.22. GTK always registers with the sesstion manager.