javascript - 对象组合模式示例

Question

我正在学习 JS，并且遇到了一篇关于 JS 中的对象组合模式的有趣文章。我想知道这段代码：

let Magic = (superclass) => class extends superclass {  
  shout() {
    if (super.shout) super.shout();
    console.log('Power and wisdom.');
  }  
};
let Fighting = (superclass) => class extends superclass {  
  shout() {
    if (super.shout) super.shout();
    console.log('Strength an courage.');
  }  
};
class Creature {
  constructor(name) {
   this.name = name;  
  }
  shout() {
    console.log(`I'm ${this.name}! Oorah!!`);
  }
};
class DwarfWizard extends Fighting(Magic(Creature)) {  
  courseObjects(object = {}) {
    object.curse = true;
    return object;
  }
}
new DwarfWizard('Thordalf').shout();
// "I'm Thordalf! Oorah!! Power and wisdom. Strength an courage."

类中函数的目的是courseObjects什么DwarfWizard？

  courseObjects(object = {}) {
    object.curse = true;
    return object;
  }

即使我注释掉该函数，我仍然得到相同的结果，所以我想知道它的目的是什么？