@GetMapping("/vets")
    public String showVetList(Map<String, Object> model) {
        // Here we are returning an object of type 'Vets' rather than a collection of Vet objects
        // so it is simpler for Object-Xml mapping
        Vets vets = getVets();
        model.put("vets", vets);
        return "vets/vetList";
    }
@author Juergen Hoeller
@author Mark Fisher
@author Ken Krebs
@author Arjen Poutsma
src/main/java/org/springframework/samples/petclinic/web/VetController.java