请问在api9中如何实现变量的按引用传递呀？

class MyObject {
  value: string;

  constructor(initValue: string) {
    this.value = initValue;
  }
}

@Entry
@Component
struct ExampleComponent {
  @State myObject: MyObject = new MyObject("初始值");

  build() {
    Column() {
      Button('点击修改对象').onClick(() => {
        this.test()
      });
      Text(`对象值: ${this.myObject.value}`);
    }
  }

  test() {
    this.myObject.value = "新值"
  }
}