scala> class Movable; class Car extends Movable; class Bike extends Movable
defined class Movable
defined class Car
defined class Bike

scala> case class Foo(car: Car, bike: Bike)
defined class Foo

scala> val foo = Foo(new Car, new Bike)
foo: Foo = Foo(Car@21a80fb8,Bike@20a00a4b)

scala> foo.productIterator
res7: Iterator[Movable] = non-empty iterator