@Test
public void testWithOverridenAliases() {

	MonolingualTextValue newAlias = new MonolingualTextValueImpl(
			"A new alias of P42", "en");
	PropertyDocument withAlias = pd1.withAliases("en", Collections.singletonList(newAlias));
	assertEquals(Collections.singletonList(newAlias), withAlias.getAliases().get("en"));
}