
'destroy' is emitted before the actor is unmapped during destruction, so notify::mapped would emit an exception. Since unmapping is guaranteed, the 'destroy' signal is unnecessary. https://bugzilla.gnome.org/show_bug.cgi?id=684154
'destroy' is emitted before the actor is unmapped during destruction, so notify::mapped would emit an exception. Since unmapping is guaranteed, the 'destroy' signal is unnecessary. https://bugzilla.gnome.org/show_bug.cgi?id=684154