if (expires != null && expires.getTime() < systemHelper.getCurrentTimeAsLong()) {
                    final Object idValue = document.get(fessConfig.getIndexFieldId());
                    if (idValue != null && !indexingHelper.deleteDocument(searchEngineClient, idValue.toString())) {
                        logger.debug("Failed to delete expired document: {}", url);
                    }
                    return true;

        final List<String> docIdList = new ArrayList<>();
        for (final Map<String, Object> inputDoc : docList) {
            final Object idValue = inputDoc.get(fessConfig.getIndexFieldId());
            if (idValue == null) {
                continue;
            }

            final Object configIdValue = inputDoc.get(fessConfig.getIndexFieldConfigId());