anchor.diff:      _shownNames = new NodeList<SimpleIdentifier>(this, shownNames);
     }
   
  -  /**
  -   * TODO(paulberry): add commas.
  -   */
  -  @override
  +  @override
  +  // TODO(paulberry): add commas.
     Iterable get childEntities => new ChildEntities()
       ..add(keyword)
       ..addAll(_shownNames);
  
positive.code:   Token get endToken => token;
  
    /**
     * Returns `true` if this identifier is the "name" part of a prefixed
     * identifier or a method invocation.
     */
    bool get isQualified {
  
negative.code:   @override
    Token get beginToken => leftParenthesis;
  
    @override
    // TODO(paulberry): Add commas.
    Iterable get childEntities => new ChildEntities()
      ..add(leftParenthesis)
      ..addAll(_arguments)
  