def METHOD_NAME(db, doc_ids):
    results = Results(set(), set(), set())
    with IterDB(db) as iter_db:
        for chunk in chunked(set(doc_ids), 100):
            for res in send_keys_to_couch(db, keys=set(chunk)):
                doc_id = res['key']
                if res.get('error', None) == 'not_found':
                    results.not_found.add(doc_id)
                elif res.get('value', {}).get('deleted', False):
                    iter_db.save(
                        get_deleted_doc(db, doc_id, res['value']['rev'])
                    )
                    results.restored.add(doc_id)
                else:
                    results.not_deleted.add(doc_id)
    return results, iter_db