code: def devices(self):
          
          if self._devices is None:
              self._devices = DeviceList(self._version, fleet_sid=self._solution['sid'], )
          return self._devices
docs: Access the devices
  
          :returns: twilio.rest.preview.deployed_devices.fleet.device.DeviceList
          :rtype: twilio.rest.preview.deployed_devices.fleet.device.DeviceList