public void whenWritingVehicleV2_readingAgainAssignsCorrectType(){
Builder builder = VehicleRoutingProblem.Builder.newInstance();
VehicleTypeImpl type1 = VehicleTypeImpl.Builder.newInstance("vehType").addCapacityDimension(0, 20).build();
VehicleTypeImpl type2 = VehicleTypeImpl.Builder.newInstance("vehType2").addCapacityDimension(0, 200).build();
VehicleImpl v1 = VehicleImpl.Builder.newInstance("v1").setReturnToDepot(false).setStartLocationId("loc").setType(type1).build();
VehicleImpl v2 = VehicleImpl.Builder.newInstance("v2").setStartLocationId("loc").setType(type2).build();
builder.addVehicle(v1);
builder.addVehicle(v2);
Service s1 = Service.Builder.newInstance("1").addSizeDimension(0, 1).setLocationId("loc").setServiceTime(2.0).build();