public static CarConfiguration WithAutomaticAirConditioning(this CarConfiguration carConfiguration) => carConfiguration.WithOptionalEquipment(OptionalEquipment.Automatic_air_conditioning);
public static CarConfiguration WithProfessionalNavigationSystems(this CarConfiguration carConfiguration) => carConfiguration.WithOptionalEquipment(OptionalEquipment.Navigation_system_professional);
public static CarConfiguration WithPackage(this CarConfiguration carConfiguration, OptionalEquipment[] package) { return(carConfiguration.WithOptionalEquipment(package)); }