'Delete LUNs backing each snapshot in the group snapshot.
:returns: An implicit update for snapshots models that is interpreted
by the manager to set their models to deleted.'

def delete_group_snapshot(self, group_snapshot, snapshots):

    for snapshot in snapshots:
        self._delete_lun(snapshot['name'])
        LOG.debug('Snapshot    %s    deletion    successful', snapshot['name'])
    return (None, None)
