[    PegGrammar(Option=None, query_r,
        grammar
        {     
            xdigit_p= [Nd]/['a'..'f']/['A'..'F'];
            guid_r:Guid =xdigit_p{4} '-' xdigit_p{2} '-' xdigit_p{2} '-' xdigit_p{2} '-' xdigit_p{8};
            query_r:Guid=guid_r;
        }
    )]
  class Class1
  {
        guid_r(_:NToken, _:NToken, _:NToken, _:NToken, _:NToken, _:NToken, _:NToken, _:NToken, _:NToken):Guid
        {
            Guid()
        }
  }