forwardDownloadError example

$esdID = (int) $this->request->getParam('esdID', 0);

        if ($esdID === 0) {
            $this->forward('downloads');

            return;
        }

        try {
            $download = $esdService->loadEsdOfCustomer($this->container->get('session')->offsetGet('sUserId'), $esdID);
        } catch (EsdNotFoundException $exception) {
            $this->forwardDownloadError(1);

            return;
        }

        if (empty($download->getFile())) {
            $this->forwardDownloadError(1);

            return;
        }

        $filePath = $esdService->getLocation($download);