Outliner.Scene.OutlinerScene.addHandleToListInDict C# (CSharp) Method

        private void addHandleToListInDict(Int32 handle, Dictionary<Int32, List<Int32>> dict, Int32 listHandle)
        {
            List<Int32> list;
            if (!dict.TryGetValue(listHandle, out list))
            {
                list = new List<Int32>();
                dict.Add(listHandle, list);
            }
            list.Add(handle);
        }