如何检查mobx observable是否有订阅者？

import { observable, autorun } from "mobx";

const myObservable = observable.box(10);

const disposer = autorun(() => {
  console.log("Value:", myObservable.get());
});

const observers = mobx.getObservers(myObservable);
console.log("Number of observers:", observers.length);

// 输出结果：
// Value: 10
// Number of observers: 1

disposer(); // 取消订阅

const observersAfterDisposer = mobx.getObservers(myObservable);
console.log("Number of observers:", observersAfterDisposer.length);

// 输出结果：
// Number of observers: 0