private void menuHandle(object s)
        {
            AnimationClip target = base.target as AnimationClip;

            AnimationEvent[] events = AnimationUtility.GetAnimationEvents(target);
            AnimationEvent   e      = (AnimationEvent)s;

            if (e != null)
            {
                isDirty = true;
                ArrayUtil.AddItem(ref events, e);
                AnimationUtility.SetAnimationEvents(target, events);
            }
        }