anchor.diff:      article.body = 'Thine eyes call me in a new way';
       article.author = authors['William Shakespeare'];
       comment = new Comment();
  -    comment.date = new Date.fromMillisecondsSinceEpoch(new Date.now().value - 20987497);
  +    comment.date = new Date.fromMillisecondsSinceEpoch(new Date.now().millisecondsSinceEpoch - 20987497);
       comment.body = "great article!";
       comment.user = users['jdoe'];
       article.comments.add(comment);
  
positive.code:     article.body = 'Las callecitas de Buenos Aires tienen ese no se que...';
      article.author = authors['Jorge Luis Borges'];
      var comment = new Comment();
      comment.date = new Date.fromMillisecondsSinceEpoch(new Date.now().value - 780987497);
      comment.body = "Well, you may do better...";
      comment.user = users['lsmith'];
      article.comments.add(comment);
      objectory.save(article);            
      comment = new Comment();
      comment.date = new Date.fromMillisecondsSinceEpoch(new Date.now().value - 90987497);
      comment.body = "I love this article!";
      comment.user = users['jdoe'];
      article.comments.add(comment);    
  
negative.code:   }).then((_) { 
     objectory.close();
    });      
  }
  