gdk/screen.go
func (v *Screen) GetRootWindow() (*Window, error) {
	return toWindow(C.gdk_screen_get_root_window(v.native()))
}
func (v *Screen) GetRootWindow() (*Window, error) {
	return toWindow(C.gdk_screen_get_root_window(v.native()))
}
// GetRootWindow is a wrapper around gdk_screen_get_root_window().