Piwik\Plugins\CoreHome\Columns\UserId::isUsedInSiteCached PHP Метод

    private function isUsedInSiteCached($idSite, $period, $date)
    {
        $cache = Cache::getTransientCache();
        $key = sprintf('%d.%s.%s', $idSite, $period, $date);
        if (!$cache->contains($key)) {
            $result = $this->isUsedInSite($idSite, $period, $date);
            $cache->save($key, $result);
        }
        return $cache->fetch($key);
    }