anchor.diff:    final SendPort _input;
     final ReceivePort _output;
     
  +  final StreamController _lineBack = new StreamController();
  +  Stream get output => _lineBack.stream;
  +  
     static Future create([List<String> args]) {
       args = args == null ? [] : args;
       var spawned = new Completer();
  
positive.code:     return GameBridge.create([msg.clientId]).then((game) {
        _games[gameId] = game;
        print('New game $gameId created by ${msg.clientId}');
      });
    }
    
  
negative.code:   }
    
    GameBridge.fromIsolate(this._output, this._input) {
      _output.listen((msg) {
        _lineBack.add(msg);
      });
    }
    
  