private bool IsTouching(VRTK_InteractableObject go)
    {
        var  touchingObjs = go.GetTouchingObjects();
        bool touching     = false;

        for (int i = 0; i < touchingObjs.Count; ++i)
        {
            if (!go.transform.IsChildOf(touchingObjs[i].transform))
            {
                touching = true;
            }
        }
        return(touching);
    }