public function getCommercialUseNotAllowedWikis() { if (empty(self::$wikiList)) { self::$wikiList = WikiaDataAccess::cache(wfSharedMemcKey(self::CACHE_KEY_COMMERCIAL_NOT_ALLOWED), self::CACHE_VALID_TIME, function () { return $this->getWikisWithVar(); }); } return self::$wikiList; }