protected function _getExportFileName()
    {
        $sSessionFileName = \OxidEsales\Eshop\Core\Registry::getSession()->getVariable("sExportFileName");
        if (!$sSessionFileName) {
            $sSessionFileName = md5($this->getSession()->getId() . \OxidEsales\Eshop\Core\Registry::getUtilsObject()->generateUId());
            \OxidEsales\Eshop\Core\Registry::getSession()->setVariable("sExportFileName", $sSessionFileName);
        }

        return $sSessionFileName;
    }