code: def usage_records(self):
          
          if self._usage_records is None:
              self._usage_records = UsageRecordList(self._version, sim_sid=self._solution['sid'], )
          return self._usage_records
docs: Access the usage_records
  
          :returns: twilio.rest.wireless.v1.sim.usage_record.UsageRecordList
          :rtype: twilio.rest.wireless.v1.sim.usage_record.UsageRecordList