static void Open(MultiScene multiScene)
        {
            bool cancelled = !EditorSceneManager.SaveCurrentModifiedScenesIfUserWantsTo();

            if (cancelled)
            {
                return;
            }

            EditorSceneManager.RestoreSceneManagerSetup(multiScene.ToSceneSetups());
        }
 static void Update(MultiScene multiScene)
 {
     multiScene.UpdateSceneSetups(EditorSceneManager.GetSceneManagerSetup());
 }