function actionCloseWikis(array $userIds)
 {
     wfProfileIn(__METHOD__);
     $wikis = $this->tracker->getWikisCreatedByUsers($userIds);
     foreach ($wikis as $id) {
         WikiFactory::disableWiki($id, 0, self::CLOSE_WIKI_REASON);
     }
     wfProfileOut(__METHOD__);
 }