如何筛选父类型，以便在TypeScript中选择给定类型的子类型？

class Animal {
  name: string;
  constructor(name: string) {
    this.name = name;
  }
}

class Dog extends Animal {
  breed: string;
  constructor(name: string, breed: string) {
    super(name);
    this.breed = breed;
  }
}

class Cat extends Animal {
  color: string;
  constructor(name: string, color: string) {
    super(name);
    this.color = color;
  }
}

function isDog(animal: Animal): animal is Dog {
  return animal instanceof Dog;
}

function isCat(animal: Animal): animal is Cat {
  return animal instanceof Cat;
}

const animals: Animal[] = [
  new Dog("Buddy", "Labrador"),
  new Cat("Kitty", "White"),
  new Dog("Max", "Golden Retriever")
];

const dogs: Dog[] = animals.filter(isDog);
const cats: Cat[] = animals.filter(isCat);

console.log(dogs); // 输出：[Dog { name: 'Buddy', breed: 'Labrador' }, Dog { name: 'Max', breed: 'Golden Retriever' }]
console.log(cats); // 输出：[Cat { name: 'Kitty', color: 'White' }]