ordered = (OrderedMap) map;
Iterator it = confirmed.keySet().iterator();
Object confirmedLast = it.next();
while (it.hasNext()) {
Object confirmedObject = it.next();
assertEquals(confirmedObject, ordered.nextKey(confirmedLast));
confirmedLast = confirmedObject;
}
assertEquals(null, ordered.nextKey(confirmedLast));
if (isAllowNullKey() == false) {