readings2[0] = new String[] { "next" };
        SuggestItem item2 = new SuggestItem(new String[] { "次" }, readings2, new String[] { "content" }, 1, 0, -1, new String[] { "tag1" },
                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.DOCUMENT);
        suggester.indexer().index(item2);
        suggester.refresh();

        OptionalEntity<CharMappingItem> result2 = charMappingFile.get(2L);
        assertTrue(result2.isPresent());
        CharMappingItem item2 = result2.get();
        assertEquals(2L, item2.getId());
        assertArrayEquals(new String[] { "d", "e" }, item2.getInputs());
        assertEquals("f", item2.getOutput());

        OptionalEntity<CharMappingItem> result3 = charMappingFile.get(3L);
        assertFalse(result3.isPresent());
    }

        String[] text2 = { "test" };
        String[][] readings2 = { { "test" } };
        SuggestItem item2 = new SuggestItem(text2, readings2, null, 5L, 10L, 1.0f, new String[0], null, null, SuggestItem.Kind.QUERY);

        SuggestItem merged = SuggestItem.merge(item1, item2);

        assertNotNull(merged);
        assertEquals(30L, merged.getQueryFreq());
        assertEquals(15L, merged.getDocFreq());

            SuggestItem mergedItem = item1;
            for (final SuggestItem item2 : items) {
                if (item1.equals(item2)) {
                    continue;
                }

                final String item2Id = item2.getId();
                if (item1Id.equals(item2Id)) {
                    mergedItem = SuggestItem.merge(mergedItem, item2);
                    mergedIdSet.add(item1Id);
                }
            }

        SuggestItem item2 = new SuggestItem(new String[] { "テスト" }, readings, new String[] { "content" }, 2, 0, -1, new String[] { "tag2" },
                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.DOCUMENT);

        SuggestItem[] mergedItems = writer.mergeItems(new SuggestItem[] { item1, item2 });

        assertNotNull(mergedItems);

    type: str = "car"


class PlaneItem(BaseItem):
    type: str = "plane"
    size: int


items = {
    "item1": {"description": "All my friends drive a low rider", "type": "car"},
    "item2": {
        "description": "Music is my aeroplane, it's my aeroplane",
        "type": "plane",
        "size": 5,
    },
}


@app.get("/items/{item_id}", response_model=PlaneItem | CarItem)

    }

    /**
     * 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) {
        return SuggestItemMerger.merge(item1, item2);
    }

    /**
     * Checks if the suggest item contains any of the given bad words.

     */
    @Test
    public void test_serializeDeserialize_list() {
        List<String> original = new ArrayList<>();
        original.add("item1");
        original.add("item2");
        original.add("item3");

        byte[] serialized = serializer.fromObjectToBinary(original);
        assertNotNull(serialized, "Serialized data should not be null");

        assertTrue(result.isPresent());
        assertEquals(testValue, result.get());
    }

    @Test
    public void test_ofNullable_withList() {
        List<String> testValue = Arrays.asList("item1", "item2", "item3");
        OptionalEntity<List<String>> result = OptionalUtil.ofNullable(testValue);

        assertNotNull(result);
        assertTrue(result.isPresent());
        assertEquals(testValue, result.get());

        OptionalEntity<ProtwordsItem> item1 = protwordsFile.get(1);
        OptionalEntity<ProtwordsItem> item2 = protwordsFile.get(2);
        PagingList<ProtwordsItem> list = protwordsFile.selectList(0, 10);

        assertTrue(item1.isPresent());
        assertTrue(item2.isPresent());
        assertTrue(list.size() > 0);
    }

    @Test