}

    /**
     * Adds a configuration file for a specific index.
     *
     * @param index the index name
     * @param path  path to the configuration file
     */
    public void addConfigFile(final String index, final String path) {
        configListMap.computeIfAbsent(index, k -> new ArrayList<>()).add(path);
    }

    /**
     * Sets the configuration settings for the search engine.
     *