gtk/menu.go
func (v *Menu) native() *C.GtkMenu {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkMenu(p)
}
func (v *Menu) native() *C.GtkMenu {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkMenu(p)
}
// native() returns a pointer to the underlying GtkMenu.