anchor.diff:      }
     }
   }
  +
  +class JsParameter {
  +  final String name;
  +
  +  JsParameter(this.name);
  +}
positive.code: import 'js_value.dart';
  
  abstract class JsFunction extends JsValue {
    final JsObject prototype = new JsObject();
    final String name;
    final JsValue context;
  
negative.code:     var obj = JsObject.assign(new JsObject(), prototype);
      apply(obj, arguments);
      return obj;
    }
  
    @override
    String toString() {
      var b = new StringBuffer('f');
      if (name != null)
        b.write(' $name');
      b.write('(');
  
      for (int i = 0; i < parameters.length; i++) {
        if (i > 0)
          b.write(', ');
        b.write(parameters[i].name);
      }
  
      b.write(') { [native code] }');
      return b.toString();
    }
  }
  
  