final Map<String, Object> currentlyStored = this.initialSet();
currentlyStored.put("something", "Another value");
currentlyStored.put("string", "overwrite");
assertContains(pvm, currentlyStored);
pvm.save();
assertContains(pvm, currentlyStored);
final PersistableValueMap pvm2 = new JcrModifiablePropertyMap(this.rootNode);
assertContains(pvm2, currentlyStored);
}