}

            @Override
            public String getQueryLanguageMapping() {
                return "en:en,ja:ja";
            }

            @Override
            public String getQueryDefaultLanguages() {
                return "en,ja";
            }

            @Override
            public String[] getQueryAdditionalResponseFields(String... fields) {
                return fields;
            }

            public String getIndexFieldDocId() {
                return baseConfig.getIndexFieldDocId();
            }

            @Override
            public String getQueryDefaultLanguages() {
                return baseConfig.getQueryDefaultLanguages();
            }

            @Override
            public String getQueryLanguageMapping() {
                return baseConfig.getQueryLanguageMapping();
            }

            @Override
            public Integer getQueryBoostFuzzyContentExpansionsAsInteger() {
                return 10;
            }

            @Override
            public String getQueryDefaultLanguages() {
                return "en,ja";
            }

            @Override
            public String getQueryLanguageMapping() {
                return "";
            }

            @Override

        // requestLangs > default > browser
        if (StringUtil.isNotBlank(getQueryDefaultLanguages())) {
            String[] langs = (String[]) propMap.get(QUERY_DEFAULT_LANGUAGES);
            if (langs == null) {
                langs = split(getQueryDefaultLanguages(), ",").get(stream -> stream.map(String::trim).toArray(n -> new String[n]));

            }

            @Override
            public String getIndexFieldHasCache() {
                return "has_cache";
            }

            @Override
            public String getQueryDefaultLanguages() {
                return "en,ja";
            }

            @Override
            public String getQueryLanguageMapping() {
                return "en:en,ja:ja";
            }

                return fields;
            }

            public String getQueryDefaultFields() {
                return "title,content";
            }

            public String getQueryDefaultLanguages() {
                return "";
            }

            @Override
            public String getQueryLanguageMapping() {
                return "";
            }

            @Override

     * The value is, e.g.  <br>
     * comment: Default languages for queries.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getQueryDefaultLanguages();

    /**
     * Get the value for the key 'query.default.languages' as {@link Integer}. <br>
     * The value is, e.g.  <br>
     * comment: Default languages for queries.