@ModelAttribute("owner")
    public Owner findOwner(@PathVariable("ownerId") int ownerId) {
        return this.clinicService.findOwnerById(ownerId);
    }
@author Juergen Hoeller
@author Ken Krebs
@author Arjen Poutsma
src/main/java/org/springframework/samples/petclinic/web/PetController.java