final OrderItem item21 = new OrderItem( order2,
1 );
final OrderItem item22 = new OrderItem( order2,
2 );
order2.addItem( item21 );
order2.addItem( item22 );
final Order order3 = new Order( 12,
"Bob" );
final OrderItem item31 = new OrderItem( order3,
1 );
final OrderItem item32 = new OrderItem( order3,