anchor.diff:                " (group: ${group.name})");
           }
           _targetListBuilder.add(_getContextUrl(contextUrl), urlTemplate,
  -            route.conf.methods, _serverCtx.routeInvokers[route]);
  +            route.conf.methods, _serverCtx.routeInvokers[route], route.mirror, group.mirror);
         }
       }
     }
  
positive.code:               " (group: ${group.name})");
          }
          _targetListBuilder.add(contextUrl, urlTemplate, route.conf.methods,
              _serverCtx.routeInvokers[route]);
        }
  
        for (RouteMetadata route in group.routes) {
  
negative.code:   final String contextUrl;
    final UrlTemplate template;
    final Map<String, RouteInvoker> routes = {};
    final ClassMirror groupMirror;
    final MethodMirror methodMirror;
  
    _Target(this.contextUrl, this.template, [this.methodMirror, this.groupMirror]);
  }
  
  class _InterceptorListBuilder {
  