public function getReviewUser()
    {
        if ($this->_oRevUser === null) {
            $this->_oRevUser = false;
            $oUser = oxNew(\OxidEsales\Eshop\Application\Model\User::class);

            if ($sUserId = $oUser->getReviewUserId($this->getReviewUserHash())) {
                // review user, by link or other source?
                if ($oUser->load($sUserId)) {
                    $this->_oRevUser = $oUser;
                }
            } elseif ($oUser = $this->getUser()) {
                // session user?
                $this->_oRevUser = $oUser;
            }
        }

        return $this->_oRevUser;
    }