anchor.diff:  /// Drives a Flutter Application running in another process.
   class FlutterDriver {
     /// Creates a driver that uses a connection provided by the given
  -  /// [_serviceClient], [_peer] and [_appIsolate].
  +  /// [serviceClient], [_peer] and [appIsolate].
     @visibleForTesting
     FlutterDriver.connectedTo(
  -    this._serviceClient,
  +    this.serviceClient,
       this._peer,
  -    this._appIsolate, {
  +    this.appIsolate, {
       bool printCommunication = false,
       bool logCommunicationToFile = true,
     }) : _printCommunication = printCommunication,
  
positive.code:     try {
        final Map<String, String> serialized = command.serialize();
        _logCommunication('>>> $serialized');
        final Future<Map<String, dynamic>> future = _appIsolate.invokeExtension(
          _flutterExtensionMethodName,
          serialized,
        ).then<Map<String, dynamic>>((Object value) => value);
  
negative.code:   /// Returns a [Future] that fires once the connection has been closed.
    Future<void> close() async {
      // Don't leak vm_service_client-specific objects, if any
      await serviceClient.close();
      await _peer.close();
    }
  }
  