return "{}";
        }
    }

    /**
     * Parses a JSON string into a map.
     *
     * @param json the JSON string to parse.
     * @return the parsed map, or an empty map on failure.
     */
    protected Map<String, Object> parseJson(final String json) {
        try {
            return objectMapper.readValue(json, new TypeReference<Map<String, Object>>() {

        final Map<String, Object> result = coordinatorHelper.parseJson(json);
        assertEquals("heartbeat", result.get("type"));
        assertEquals("test", result.get("instanceId"));
        assertEquals(12345, result.get("createdTime"));
    }

    @Test
    public void test_parseJson_empty() {
        final Map<String, Object> result = coordinatorHelper.parseJson("{}");
        assertNotNull(result);

         * Protected to allow subclassing while preventing direct instantiation.
         */
        protected Options() {
            // nothing
        }

        /**
         * Parses the web configuration IDs string into a list.
         *
         * @return list of web configuration IDs, or null if none specified
         */
        protected List<String> getWebConfigIdList() {

        } catch (final NumberFormatException e) {
            logger.warn("Invalid rag.chat.message.max.length config, using default 4000");
            return 4000;
        }
    }

    /**
     * Parses and validates field filter parameters from the request.
     * Only configured label values are accepted to prevent query injection.
     *
     * @param request the HTTP request

            this.query = query;
            this.tags = tags;
            this.fields = fields;
            this.num = num;
            this.request = request;
        }

        /**
         * Parses the HTTP request to create a RequestParameter object.
         * @param request The HTTP servlet request containing the parameters
         * @return A new RequestParameter object with parsed values
         */

        updateConfigListenerMap.put("KeyMatch", () -> Integer.toString(ComponentUtil.getKeyMatchHelper().load()));
    }

    /**
     * Parses project properties from the given path.
     *
     * @param propPath The path to the project properties file.
     * @throws FessSystemException if the properties file cannot be parsed.
     */