assertEquals(2, childO1.getGroupArray().size());
assertEquals(1, childO2.getArtistArray().size());
assertEquals(1, childO3.getArtistArray().size());
try {
childContext.commitChangesToParent();
assertEquals(PersistenceState.COMMITTED, childO1.getPersistenceState());
assertEquals(PersistenceState.COMMITTED, childO2.getPersistenceState());
assertEquals(PersistenceState.COMMITTED, childO3.getPersistenceState());