}
public void testSharedJoinTableModifications ()
{
EntityManager pm = currentEntityManager();
ConstantJoinPC4 pc4 = pm.find(ConstantJoinPC4.class, oid);
startTx(pm);
pc4.getManyToMany ().clear ();
endTx(pm);
EntityManager pm2 = currentEntityManager();
pc4 = pm2.find(ConstantJoinPC4.class, oid);
assertNotNull (pc4.getOneToOne1 ());
assertEquals (0, pc4.getManyToMany ().size ());
}