anchor.diff:  class index {
     String name = 'index';
   
  -  void GET() {
  +  void GET(HttpRequest req) {
  +    req.response.write('Hello, world');
  +    req.response.close();
     }
   }
   
  
positive.code:   void _httpRequestHandler(HttpRequest req) {
      print('${req.method} ${req.uri.path}');
  
      for (final String url in this.urls.keys) {
        RegExp exp = new RegExp('^${url}\$');
        Iterable<Match> matches = exp.allMatches(req.uri.path);
  
        //for (Match m in matches) {
  
negative.code:       //  print('matched: ${match}');
        //}
        if (matches.length > 0) {
          try {
            if (req.method == 'GET')
              this.urls[urlRegex].GET(req);
            if (req.method == 'POST')
              this.urls[urlRegex].POST(req);
            return;
          } on NoSuchMethodError catch(e) {
            print(e);
          }
        }
      }
      // 404 not found
  