/**
     * Sets the settings index name.
     * @param settingsIndexName The settings index name.
     * @return This builder instance.
     */
    public SuggestSettingsBuilder setSettingsIndexName(final String settingsIndexName) {
        this.settingsIndexName = settingsIndexName.toLowerCase(Locale.ENGLISH);
        return this;
    }

    /**
     * Adds an initial setting.

        settingsBuilder.indicesTimeout(fessConfig.getIndexIndicesTimeout());
        settingsBuilder.searchTimeout(fessConfig.getIndexSearchTimeout());
        settingsBuilder.setSettingsIndexName(fessConfig.getIndexDocumentSuggestIndex() + "_suggest");
        suggester = Suggester.builder().settings(settingsBuilder).build(searchEngineClient, fessConfig.getIndexDocumentSuggestIndex());