Map<String, Object> nestedResult = (Map<String, Object>) result.get("nested_map");
        assertEquals("nestedValue", nestedResult.get("nested_key"));
    }

    public void test_toLowerHyphen_emptyMap() {
        Map<String, Object> source = new HashMap<>();
        Map<String, Object> result = searchLogHelper.toLowerHyphen(source);

        assertNotNull(result);
        assertTrue(result.isEmpty());