void pop_back_for (Gtk::Window&);
void pop_front ();
bool expose (GdkEventExpose*);
bool on_button_release_event (GdkEventButton*);
void on_realize ();
void pop_back_for (Gtk::Window&);
void pop_front ();
bool expose (GdkEventExpose*);
bool on_button_release_event (GdkEventButton*);
void on_realize ();