*   <li>{@link #shutdown()}: Shuts down the thread pool.</li>
 *   <li>{@link #createIndexIfNothing()}: Creates a new index if no index exists.</li>
 *   <li>{@link #createNextIndex()}: Creates a new index and replaces the current update alias with the new index.</li>
 *   <li>{@link #switchIndex()}: Switches the search alias to the current update index.</li>

        SuggestResponse response2 = suggester.suggest().setSuggestDetail(true).execute().getResponse();
        assertEquals(2, response2.getNum());

        Thread.sleep(1000);
        suggester.createNextIndex();
        SuggestItem[] items2 = getItemSet2();
        suggester.indexer().index(items2);
        suggester.refresh();