public void testStackContainerPolicy() {
    DataReadQuery query = this.buildNewQuery();
    query.useCollectionClass(Stack.class);

    stack = (Stack) getSession().executeQuery(query);
    // if we get here, we must not have generated a ClassCastException
    Record row = (Record) stack.peek();
    if (row.get("CUSTNAME") == null) {
      throw new TestErrorException("missing data");
    }
  }