code: def _update_from_database(self):
          
          collection = JSONClientValidated('assessment',
                                           collection='AssessmentSection',
                                           runtime=self._runtime)
          self._my_map = collection.find_one({'_id': self._my_map['_id']})
docs: Updates map to latest state in database.
  
          Should be called prior to major object events to assure that an
          assessment being taken on multiple devices are reasonably synchronized.