}

    /**
     * Merges two suggest items.
     * @param item1 The first suggest item.
     * @param item2 The second suggest item.
     * @return The merged suggest item.
     */
    public static SuggestItem merge(final SuggestItem item1, final SuggestItem item2) {
        if (!item1.getId().equals(item2.getId())) {
            throw new IllegalArgumentException("Item id is mismatch.");

        String[] text1 = { "item1" };
        String[][] readings1 = { { "read1" } };
        String[] tags1 = { "tag1" };
        String[] roles1 = { "role1" };
        String[] languages1 = { "en" };

        SuggestItem item1 = new SuggestItem(text1, readings1, null, 50L, 100L, 2.0f, tags1, roles1, languages1, SuggestItem.Kind.QUERY);

        String[] text2 = { "item1" }; // Same text for same ID

    }

    @Test
    public void test_mergeItems() throws Exception {
        String[][] readings = new String[1][];
        readings[0] = new String[] { "test" };

        SuggestItem item1 = new SuggestItem(new String[] { "テスト" }, readings, new String[] { "content" }, 1, 0, -1, new String[] { "tag1" },
                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.DOCUMENT);

        assertEquals("123", testTransformer.getData(intData));

        // List data
        List<String> list = new ArrayList<>();
        list.add("item1");
        list.add("item2");
        TestAccessResultData<String> listData = new TestAccessResultData<>(list.toString().getBytes());
        Object retrievedList = testTransformer.getData(listData);