Device component - ACTN Driver:

        data = self._rest_conf_client.get(subpath_url)

        if not isinstance(data, dict): raise ValueError('data should be a dict')

        if 'ietf-te:tunnel' not in data: raise ValueError('data does not contain key "ietf-te:tunnel"')

        if 'ietf-te:tunnel' not in data: return list()

        data = data['ietf-te:tunnel']

        if not isinstance(data, list): raise ValueError('data[ietf-te:tunnel] should be a list')