gtk/gtk.go
func (v *Layout) GetSize() (width, height uint) {
	var w, h C.guint
	C.gtk_layout_get_size(v.native(), &w, &h)
	return uint(w), uint(h)
}
func (v *Layout) GetSize() (width, height uint) {
	var w, h C.guint
	C.gtk_layout_get_size(v.native(), &w, &h)
	return uint(w), uint(h)
}
// Layout.GetSize is a wrapper around gtk_layout_get_size