for (int i = 0; i < iteration; i++) {
map.put(new Integer(i), new Integer(iteration - i));
}
long handle1 = map.$GET$CHECKPOINT().createCheckpoint();
map.clear();
map.$GET$CHECKPOINT().rollback(handle1, true);
System.out.println(map);
// Test keySet() and clear() of the key set.
for (int i = 0; i < iteration; i++) {