def get_expirer_info(self, recon_type):
        if recon_type == 'object':
            return self._from_recon_cache(['object_expiration_pass',
                                           'expired_last_pass'],
                                          self.object_recon_cache)
get expirer info
dataset/ETHPy150Open openstack/swift/swift/common/middleware/recon.py/ReconMiddleware.get_expirer_info