public SyntaxTreeNode(GrammarEngine gren, IntPtr hNode)
        {
            _gren  = gren;
            _hNode = hNode;

            Entry      = gren.GetEntry(GrammarApi.sol_GetNodeIEntry(_gren.GetEngineHandle(), _hNode));
            SourceWord = GetNodeContents(_hNode);

            int nleaf = GrammarApi.sol_CountLeafs(_hNode);

            Leafs = new SyntaxTreeNode[nleaf];
            for (int i = 0; i < nleaf; ++i)
            {
                Leafs[i] = new SyntaxTreeNode(_gren, GrammarApi.sol_GetLeaf(_hNode, i));
            }
        }