* Also updates the searchFieldSet for O(1) lookup performance.
     *
     * @param supportedFields array of field names that can be searched
     */
    public void setSearchFields(final String[] supportedFields) {
        searchFields = supportedFields;
        searchFieldSet = new HashSet<>();
        Collections.addAll(searchFieldSet, supportedFields);
    }

    /**
     * Gets the fields that can be used for faceted search.

        try {
            suggester.settings().array().delete(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS);
            split(fessConfig.getSuggestFieldIndexContents(), ",").of(stream -> stream.filter(StringUtil::isNotBlank).forEach(field -> {
                try {
                    suggester.settings().array().add(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS, field);
                } catch (final SuggestSettingsException e) {