super.setUp();
final FieldOrderCache fieldOrderCache = null; // TODO: should provide a mock here?
deserializer = new ObjectDeserializer(fieldOrderCache);
final TestProxySpecification specification = system.getSpecification(Vector.class);
specification.addFacet(new CollectionFacetAbstract(specification) {
@Override
public void init(final ObjectAdapter collection, final ObjectAdapter[] initData) {
for (final ObjectAdapter element : initData) {
collectionOfUnderlying(collection).add(element.getObject());