@Watch异常有了解的吗？

@StorageLink("area") @Watch("areaChangedCallback") area: WorkArea = undefined;
// @Watch("areaChangedCallback") @StorageLink("area") area: WorkArea = undefined;

  aboutToAppear() {
    this.areaChangedCallback();
  }

  areaChangedCallback() {
    this.areaId = this.area.id;
  }