<https://developer.lifterlms.com/reference/classes/llms_quiz_legacy/get_total_time/>
<http://schema.org/dateModified>
"2020-03-12T22:35:21+00:00"^^<http://schema.org/Date>
<https://developer.lifterlms.com/reference/classes/llms_quiz_legacy/get_total_time/>