@Test
public void test_map_clean() {

	TestObj obj = new TestObj();
	Map<String, Object> map = new HashMap<String, Object>();
	map.put("key", "value");
	obj.setMap(map);
	Assert.assertNotNull(map.get("key"));
	Assert.assertNotNull(obj.map);
	ObjectUtils.cleanMapOrCollectionField(obj);
	map = obj.map;
	Assert.assertNull(map);
}