text: public virtual IList<ParseTreeMatch> FindAll(IParseTree tree, string xpath){ICollection<IParseTree> subtrees = XPath.FindAll(tree, xpath, matcher.Parser);IList<ParseTreeMatch> matches = new List<ParseTreeMatch>();foreach (IParseTree t in subtrees){ParseTreeMatch match = Match(t);if (match.Succeeded){matches.Add(match);}}return matches;}