// Persist A-B as unowned
UnownedJDOOneToManyUniSetSideA a = new UnownedJDOOneToManyUniSetSideA();
a.setName("Side A");
UnownedJDOOneToManyUniSideB b = new UnownedJDOOneToManyUniSideB();
b.setName("Side B");
a.addOther(b);
pm.makePersistent(a);
Object aId = pm.getObjectId(a);
Object bId = pm.getObjectId(b);