add_signal_listener (active_descendant_event_listener, "Gtk:AtkObject:active-descendant-changed");
add_signal_listener (bounds_event_listener, "Gtk:AtkComponent:bounds-changed");
add_signal_listener (text_selection_changed_event_listener, "Gtk:AtkText:text-selection-changed");
add_signal_listener (active_descendant_event_listener, "Gtk:AtkObject:active-descendant-changed");
add_signal_listener (bounds_event_listener, "Gtk:AtkComponent:bounds-changed");
add_signal_listener (text_selection_changed_event_listener, "Gtk:AtkText:text-selection-changed");