//remove handle that has transition out of this state
public void RemoveNext(Handle startHandle)
{
NextElem.RemoveAll(x => startHandle.NextElem.Contains(x));
Next.Remove(startHandle);
}
//add handle that has transition out of this state
public void AddNext(Handle h)
{
NextElem.AddRange(h.NextElem);
Next.Add(h);
}