public static UrlValidator getInstance() {
        return DEFAULT_URL_VALIDATOR;
    }
@Test(expected = IllegalArgumentException.class)
    public void testValidator473_2() { // reject null DomainValidator with mismatched allowLocal
        List<DomainValidator.Item> items = new ArrayList<>();
        new UrlValidator(new String[]{}, null, 0L, DomainValidator.getInstance(true, items));
    }