public void PushState(string stateName)
{
if (ActiveChild != null)
{
ActiveChild.Exit();
}
State state;
if (!_children.TryGetValue(stateName, out state))
{
throw new KeyNotFoundException("Tried to push to state \"" + stateName + "\", but it is not in the list of children. State: \"" + Name + "\"");
}
if (!Root.CanTransitSelf && this == state) return;
ActiveChild = state;
Root.SetCurrentState(ActiveChild);
ActiveChild.Enter();
}