final IFilePersistence filePersistence = builder.build();
final IExclusiveDataAccessSession session = filePersistence
.createExclusiveDataAccessSession();
final IInstanceFactory instancefactory = session.getInstanceFactory();
session.open();
final PHashMap map = PHashMap.newInstance(instancefactory);
assertNotNull("must succeed create an iterator", map.keySet()
.iterator());
session.close();
filePersistence.close();
}