public function showForAction($action, OutputPage $output = null)
 {
     parent::showForAction($action, $output);
     $title = $this->context->getTitle();
     $this->context->getUser()->clearNotification($title);
     if ($output === null) {
         $output = $this->context->getOutput();
     }
     $output->addCategoryLinks($this->getCategories($title));
 }
 function __construct(Page $page, IContextSource $context)
 {
     parent::__construct($page, $context, 'edit');
 }