/**
  * Download submitted files of user.
  */
 function downloadReturned()
 {
     global $ilAccess;
     if ($ilAccess->checkAccess("read", "", $this->object->getRefId()) && $this->object->getShowSubmissions() && $this->object->getTimestamp() - time() <= 0) {
         // ok: read access + public submissions
     } else {
         $this->checkPermission("write");
     }
     if (!ilEphAssignment::deliverReturnedFiles($this->object->getId(), (int) $_GET["ass_id"], (int) $_GET["member_id"])) {
         $this->ctrl->redirect($this, "showSubmissions");
     }
     exit;
 }