* zh=zh<br>
     *  <br>
     * comment: Language mapping for queries.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getQueryLanguageMapping();

    /**
     * Get the value for the key 'query.boost.title'. <br>
     * The value is, e.g. 0.5 <br>
     * comment: Boost value for title field in queries.