ジェネリックはどうやって動物の友人の検索における型キャストを排除できるのでしょうか?

public class Animal {
    private Map<String, Animal> friends = new HashMap<>();

    public void addFriend(String name, Animal animal) {
        friends.put(name, animal);
    }

    public Animal callFriend(String name) {
        return friends.get(name);
    }
}

Mouse jerry = new Mouse();
jerry.addFriend("spike", new Dog());
jerry.addFriend("quacker", new Duck());

((Dog) jerry.callFriend("spike")).bark();
((Duck) jerry.callFriend("quacker")).quack();

public <T extends Animal> T callFriend(String name, T unusedTypeObj) {
    return (T) friends.get(name);
}

public <T extends Animal> T callFriend(String name, Class<T> type) {
    return type.cast(friends.get(name));
}

jerry.callFriend("spike", Dog.class).bark();
jerry.callFriend("quacker", Duck.class).quack();