HarmonyOS 鸿蒙Next 子组件里修改 ObjectLink 的状态无法同步回父组件？我修改了某个todo的 complete，但是父组件 this.arrA.filter(i => i.complete).length 的数据没有变化

@Component
struct TodoItemView {
  todoItem: TodoItem = new TodoItem('');

  build() {
    Row() {
      Text(this.todoItem.id.toString() + '. ')

      Checkbox()
        .select(this.todoItem.complete)
        .shape(CheckBoxShape.CIRCLE)
        .onClick(() => {
          this.todoItem.toggle();
        })
      Text(this.todoItem.name)
    }.width('100%')
  }
}

@Component
struct Demo {
  private title: string = ''
  @BuilderParam slotBuilderParam: () => void

  build() {
    Row() {
      Text(this.title)

      this.slotBuilderParam()
    }.width('100%')
  }
}

@Entry
@Component
struct ObservedAndObjectLink {
  dataList: TodoItemList = new TodoItemList();

  aboutToAppear() {
    this.dataList.datas.push(...[new TodoItem('eat'), new TodoItem('run')]);
  }

  @Builder
  objectBuilder() {
    Text('objectBuilder')
  }

  @LocalBuilder
  arrayBuilder() {
    Column() {
      ForEach(this.dataList.datas,
        (item: TodoItem) => {
          TodoItemView({
            todoItem: item
          })
        },
        (item: TodoItem): string => item.id.toString()
      )

      Text(this.dataList.datas.filter(i => i.complete).length.toString() + '已完成')
      Button('增加').onClick(() => {
        this.dataList.datas.push(new TodoItem('sleep'))
      })
    }

  }

  build() {
    Column() {
      Demo({
        title: '嵌套对象',
        slotBuilderParam: () => {
          this.objectBuilder()
        }
      })

      Demo({
        title: '对象数组',
        slotBuilderParam: this.arrayBuilder
      })


    }.alignItems(HorizontalAlign.Start)
    .height('100%')
    .width('100%')
  }
}

let NextID: number = 1;

@ObservedV2
class TodoItem {
  @Trace id: number;
  @Trace name: string;
  @Trace complete: boolean;

  constructor(name: string) {
    this.id = NextID++;
    this.name = name;
    this.complete = false;
  }

  toggle() {
    this.complete = !this.complete;
  }
}

//xxx.ets
@Observed
export class ObservedArray<T> extends Array<T> {
  constructor(args?: T[]) {
    if (args instanceof Array) {
      super(...args);
    } else {
      super();
    }
  }
}

@ObservedV2
export class TodoItemList {
  @Trace datas: ObservedArray<TodoItem> = new ObservedArray();
}