'Find all snapshot groups associated with an E-Series volume
:param vol: An E-Series volume object
:return: A list of snapshot groups
:raise NetAppDriverException: if the list of snapshot groups cannot be
retrieved'

def _get_snapshot_groups_for_volume(self, vol):

    return [grp for grp in self._client.list_snapshot_groups() if (grp['baseVolume'] == vol['id'])]
