final MarshallerPool pool = getMarshallerPool();
final Unmarshaller unmarshaller = pool.acquireUnmarshaller();
unmarshaller.setProperty(XML.GML_VERSION, version);
final DefaultVerticalDatum datum =
(DefaultVerticalDatum) unmarshaller.unmarshal(getClass().getResource(GML31_FILE));
pool.recycle(unmarshaller);
/*
* Following attribute exists in GML 3.1 only.
*/
assertEquals("vertDatumType", VerticalDatumType.GEOIDAL, datum.getVerticalDatumType());
/*