try {
a = (A) pm.getObjectById(pm.newObjectIdInstance(A.class, "" + 0), false);
} catch (JDOException e) {
fail("The A instance is not found on the data support");
}
Collection names = a.names();
assertNotNull("name collection is null", names);
assertEquals("Bad name collection size", NB_B, names.size());
B[] bs = new B[NB_B];
for(int i=0; i<NB_B; i++) {
String idx = IDX_PREFIX + i;