final CrawlingConfigHelper crawlingConfigHelper = ComponentUtil.getCrawlingConfigHelper();
        final String configId = DocumentUtil.getValue(doc, fessConfig.getIndexFieldConfigId(), String.class);
        if (configId == null) {
            final String docId = DocumentUtil.getValue(doc, fessConfig.getIndexFieldId(), String.class);

        }

        // cid
        final String configId = crawlingConfig.getConfigId();
        if (configId != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldConfigId(), configId);
        }
        //  expires
        if (documentExpires != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldExpires(), documentExpires);
        }
        // lang

     * The value is, e.g. config_id <br>
     * comment: Field name for config ID in the index.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexFieldConfigId();

    /**
     * Get the value for the key 'index.field.expires'. <br>
     * The value is, e.g. expires <br>
     * comment: Field name for expiration date in the index.