Pimcore\Model\AbstractModel::__sleep PHP Метод

    public function __sleep()
    {
        $finalVars = [];
        $blockedVars = ["dao", "_fulldump"];
        // _fulldump is a temp var which is used to trigger a full serialized dump in __sleep eg. in Document, \Object_Abstract
        $vars = get_object_vars($this);
        foreach ($vars as $key => $value) {
            if (!in_array($key, $blockedVars)) {
                $finalVars[] = $key;
            }
        }
        return $finalVars;
    }