anchor.diff:        : defaultTryPorts;
     final bool verboseMode = args[argVerbose];
     final String hostname = args[argHost];
  +  final String appSizeBase = args[argAppSizeBase];
  +  final String appSizeTest = args[argAppSizeTest];
   
     if (help) {
       print('Dart DevTools version ${await _getVersion()}');
  
positive.code:           _normalizeVmServiceUri(serviceProtocolUri).toString();
      }
  
      String url = devToolsUrl.toString();
      // If serviceProtocolUri != null, add it to the url.
      if (serviceProtocolUri != null) {
        url = Uri.parse(devToolsUrl).replace(queryParameters: {
          'uri': serviceProtocolUri,
        }).toString();
      }
  
      try {
  
negative.code:   shelf.Handler handler,
    String serviceProtocolUri,
    String profileFilename,
    String appSizeBase,
    String appSizeTest,
  }) async {
    hostname ??= 'localhost';
  
  