'Get QoS id by lun id.'

def get_qosid_by_lunid(self, lun_id):

    url = ('/lun/' + lun_id)
    result = self.call(url, None, 'GET')
    self._assert_rest_result(result, _('Get    QoS    id    by    lun    id    error.'))
    return result['data']['IOCLASSID']
