public bool this[IAINode node]
            {
                get
                {
                    if (node.IsNullOrDestroyed())
                    {
                        return(true);
                    }

                    bool result;
                    if (_table.TryGetValue(AITreeDebugWindow.GetNodeHash(node), out result))
                    {
                        return(result);
                    }
                    return(true);
                }
                set
                {
                    if (node.IsNullOrDestroyed())
                    {
                        return;
                    }

                    _table[AITreeDebugWindow.GetNodeHash(node)] = value;
                }
            }