考虑到这一节课；我将如何迭代其中包含的方法？

class Animal {
    constructor(type){
        this.animalType = type;
    }
    getAnimalType(){
        console.log('this.animalType: ', this.animalType );
    }
}

let cat = window.cat = new Animal('cat')

我尝试过的以下操作均未成功：

for (var each in Object.getPrototypeOf(cat) ){
    console.log(each);
}