String value = "FIELD-VALUE";
PersistentFieldChange change = new PersistentFieldChangeImpl("foo.bar", "field", value);
Collection<PersistentFieldChange> changes = Arrays.asList(change);
PersistentFieldBundle bundle = new PersistentFieldBundleImpl(changes);
assertTrue(bundle.containsValue("foo.bar", "field"));
assertSame(bundle.getValue("foo.bar", "field"), value);
assertFalse(bundle.containsValue("foo.bar", "other"));
}