assertNull(DocumentUtil.getValue(doc, "key", StringBuilder.class));

        assertEquals("value", DocumentUtil.getValue(doc, "key", String.class));
    }

    public void test_list_to_string_array_conversion() {
        Map<String, Object> doc = new HashMap<>();
        List<Object> mixedList = Arrays.asList("string", 123, true, null, 45.67);
        doc.put("key", mixedList);