public static ReGoapState <T, W> Instantiate(ReGoapState <T, W> old = null)
{
if (cachedStates == null)
{
cachedStates = new Stack <ReGoapState <T, W> >();
}
ReGoapState <T, W> state = cachedStates.Count > 0 ? cachedStates.Pop() : new ReGoapState <T, W>();
state.Init(old);
return(state);
}
