AdvUtils.Trie.Node.AddChild C# (CSharp) Метод

            public void AddChild(byte[] str, int idx, int data)
            {
                if (_children == null)
                {
                    _children = new List<Node>(1);
                    _childChars = new List<byte>(1);
                }

                int childIdx = _childChars.IndexOf(str[idx]);
                if (childIdx < 0)
                {
                    childIdx = _children.Count;
                    _children.Add(new Node());
                    _childChars.Add(str[idx]);
                }

                if (idx < str.Length - 1)
                {
                    _children[childIdx].AddChild(str, idx + 1, data);
                }
                else
                {
                    _children[childIdx].SetData(data);
                }
            }