$submission = $DB->get_record('workshop_submissions', array('id' => $assessment->submissionid), '*', MUST_EXIST);
list($workshop, $course, $cm, $context) = self::validate_workshop($submission->workshopid);
$submission = $DB->get_record('workshop_submissions', array('id' => $assessment->submissionid), '*', MUST_EXIST);
list($workshop, $course, $cm, $context) = self::validate_workshop($submission->workshopid);