private void SaveSceneAs(object userdata)
        {
            int   handle        = (int)userdata;
            Scene sceneByHandle = EditorSceneManager.GetSceneByHandle(handle);

            if (sceneByHandle.isLoaded)
            {
                EditorSceneManager.SaveSceneAs(sceneByHandle);
            }
        }
        private void SaveSceneAs(object userdata)
        {
            Scene sceneByHandle = EditorSceneManager.GetSceneByHandle((int)userdata);

            if (!sceneByHandle.isLoaded)
            {
                return;
            }
            EditorSceneManager.SaveSceneAs(sceneByHandle);
        }