return new SMailDeliveryDepartment(createPostalParkingLot(), createPostalPersonnel());
    }

    // -----------------------------------------------------
    //                                    Postal Parking Lot
    //                                    ------------------
    protected SMailPostalParkingLot createPostalParkingLot() {
        final SMailPostalParkingLot parkingLot = new SMailPostalParkingLot();