String getQueryDefaultLanguages();

    String getQueryLanguageMapping();

    default Map<String, String> getQueryLanguageMappingMap() {
        @SuppressWarnings("unchecked")
        Map<String, String> params = (Map<String, String>) propMap.get(QUERY_LANGUAGE_MAPPING);
        if (params == null) {
            params = stream(getQueryLanguageMapping().split("\n")).get(stream -> stream.filter(StringUtil::isNotBlank).map(v -> {

     * 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.