code: protected function addNewsAttributes($news, $title, $start, $end, $intro, $text)
      {
          $news->addAttribute($title);
          $news->addAttribute($start);
          $news->addAttribute($end);
          $news->addAttribute($intro);
          $news->addAttribute($text);
  
          return $news;
      }
docs: Fill news attributes
  
  @param Content          $news
  @param ContentAttribute $title
  @param ContentAttribute $start
  @param ContentAttribute $end
  @param ContentAttribute $intro
  @param ContentAttribute $text
  
  @return Content