anchor.diff:    @override
     bool get isFinal => _parameter != null && _parameter.isFinal;
   
  +  @override
  +  NodeList<Annotation> get metadata => _parameter.metadata;
  +
     /**
      * Return the formal parameter with which the default value is associated.
      */
  
positive.code:    * Return the kind of this parameter.
     */
    ParameterKind get kind;
  }
  
  /**
  
negative.code:     return ParameterKind.REQUIRED;
    }
  
    @override
    NodeList<Annotation> get metadata => _metadata;
  
    /**
  