def deployed_devices(self):
        """
        :returns: Version deployed_devices of preview
        :rtype: twilio.rest.preview.deployed_devices.DeployedDevices
        """
        if self._deployed_devices is None:
            self._deployed_devices = DeployedDevices(self)
        return self._deployed_devices
:returns: Version deployed_devices of preview
        :rtype: twilio.rest.preview.deployed_devices.DeployedDevices