public static QuadTreeGizmosDrawer DrawGizmos(QuadTree tree)
        {
            GameObject           gObj   = new GameObject("QuadTree Drawer");
            QuadTreeGizmosDrawer drawer = gObj.AddComponent <QuadTreeGizmosDrawer>();

            drawer.m_QuadTree = tree;

            return(drawer);
        }
 public static void DestroyGizmos(QuadTreeGizmosDrawer drawer)
 {
     GameObject.Destroy(drawer.gameObject);
 }