public void testCommitChangesRO4() throws Exception {
ROArtist a1 = fetchROArtist("artist1");
Painting painting = (Painting) context.newObject("Painting");
painting.setPaintingTitle("paint");
a1.addToPaintingArray(painting);
assertEquals(PersistenceState.MODIFIED, a1.getPersistenceState());
try {
context.commitChanges();
}