settingsBuilder.searchTimeout(fessConfig.getIndexSearchTimeout());
        settingsBuilder.setSettingsIndexName(fessConfig.getIndexDocumentSuggestIndex() + "_suggest");
        suggester = Suggester.builder().settings(settingsBuilder).build(searchEngineClient, fessConfig.getIndexDocumentSuggestIndex());
        if (ComponentUtil.hasPopularWordHelper()) {
            popularWordHelper = ComponentUtil.getPopularWordHelper();
        }

     * The value is, e.g. fess <br>
     * comment: Index name for suggest documents.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexDocumentSuggestIndex();

    /**
     * Get the value for the key 'index.document.crawler.index'. <br>
     * The value is, e.g. fess_crawler <br>
     * comment: Index name for crawler documents.