'Unset the specified keys of QoS specification.
:param keys: keys to delete from the QoS specification.
TODO(jordanP): Add a link once LP #1524877 is fixed.'

def unset_qos_key(self, qos_id, keys):

    put_body = json.dumps({'keys': keys})
    (resp, body) = self.put(('qos-specs/%s/delete_keys' % qos_id), put_body)
    self.expected_success(202, resp.status)
    return rest_client.ResponseBody(resp, body)
