private void operateOnClient1And2(
ArrayList4Operation<Integer> op1, ArrayList4Operation<Integer> op2) throws Exception {
ExtObjectContainer client1 = openNewSession();
ExtObjectContainer client2 = openNewSession();
ArrayList4<Integer> list1 = retrieveAndAssertNullArrayList4(client1);
ArrayList4<Integer> list2 = retrieveAndAssertNullArrayList4(client2);
op1.operate(list1);
op2.operate(list2);
client1.store(list1);
client2.store(list2);
client1.commit();
client2.commit();
client1.close();
client2.close();
}
