public static bool PanePushBack(this BflytFile f, string paneName)
        {
            var target = f[paneName];

            if (target == null)
            {
                return(false);
            }
            f.MovePane(target, target.Parent, target.Parent.Children.Count);
            return(true);
        }
        public static bool PanePullToFront(this BflytFile f, string paneName)
        {
            var target = f[paneName];

            if (target == null)
            {
                return(false);
            }
            f.MovePane(target, target.Parent, 0);
            return(true);
        }