private void ParseSignature(XmlNode inner, PointCutDefinition def)
{
XmlNode signature = inner.SelectSingleNode("signature");
StringReader reader = new StringReader(signature.InnerText);
AspectLanguageLexer lexer = new AspectLanguageLexer(reader);
AspectParser parser = new AspectParser(lexer);
parser.ParsePointcutSignature(def);
}