Object pk = a.getObjectId().getReplacementIdMap().get(Artist.ARTIST_ID_PK_COLUMN);
assertNotNull(pk);
assertEquals(pk, DataObjectUtils.longPKForObject(a));
context.commitChanges();
Object pkAfterCommit = a.getObjectId().getIdSnapshot().get(
Artist.ARTIST_ID_PK_COLUMN);
assertEquals(pk, pkAfterCommit);
}