PersistenceManager pm = pmf.getPersistenceManager();
pm.getObjectIdClass(Maps.class);
//get the sequence
Sequence s = pm.getSequence(MAP_SEQ);
assertNotNull("Sequence " + MAP_SEQ + " should not be null.", s);
Maps m1 = new Maps();
m1.setName("map 1");
Maps m2 = new Maps();
m2.setName("map 2");
Collection c = new ArrayList();
c.add(m1);
c.add(m2);
//make persistent