public void ReturnObject(GObject obj)
{
string url = obj.resourceURL;
Queue<GObject> arr;
if (!_pool.TryGetValue(url, out arr))
{
arr = new Queue<GObject>();
_pool.Add(url, arr);
}
ToolSet.SetParent(obj.displayObject.cachedTransform, _manager);
arr.Enqueue(obj);
}