assertNull(properties.put(NAME_KEY, "My “object”."));
assertNull(properties.put(SCOPE_KEY, "Large scale topographic mapping and cadastre."));
assertNull(properties.put(REMARKS_KEY, "注です。"));
assertNull(properties.put(IDENTIFIERS_KEY, new ImmutableIdentifier(
HardCodedCitations.OGP, "EPSG", "4326", "8.2", null)));
assertNull(properties.put(DOMAIN_OF_VALIDITY_KEY, new DefaultExtent("Netherlands offshore.",
new DefaultGeographicBoundingBox(2.54, 6.40, 51.43, 55.77),
new DefaultVerticalExtent(10, 1000, VerticalCRSMock.DEPTH),
new DefaultTemporalExtent()))); // TODO: needs sis-temporal module for testing that one.
final IdentifiedObject object = new AbstractReferenceSystem(properties);