class Car { has Str $.make; has Str $.model; has UInt $.year where * > 1885; } multi set-car(Car $car where .make.defined) { say "With only make: ", $car } multi set-car(Car $car where .model.defined) { say "With only model: ", $car } multi set-car(Car $car) { say "Any car: ", $car } set-car Car.new: :make<Fiat>; set-car Car.new: :model<Uno>; set-car Car.new: :make<Fiat>, :model<Uno>, :year(2002), ;