gtk/window.go
func (v *Window) GetPosition() (root_x, root_y int) {
	var x, y C.gint
	C.gtk_window_get_position(v.native(), &x, &y)
	return int(x), int(y)
}
func (v *Window) GetPosition() (root_x, root_y int) {
	var x, y C.gint
	C.gtk_window_get_position(v.native(), &x, &y)
	return int(x), int(y)
}
// GetPosition is a wrapper around gtk_window_get_position().