visitor: (String path, Page<Object, dynamic> page) {
      /// 只有特定的范围的 Page 才需要建立和 AppStore 的连接关系
      /// 满足 Page<T> ，T 是 GlobalBaseState 的子类
      if (page.isTypeof<GlobalBaseState>()) {
        /// 建立 AppStore 驱动 PageStore 的单向数据连接
        /// 1. 参数1 AppStore
        /// 2. 参数2 当 AppStore.state 变化时, PageStore.state 该如何变化
        page.connectExtraStore<GlobalState>(GlobalStore.store,
            (Object pagestate, GlobalState appState) {
          final GlobalBaseState p = pagestate;
          if (p.themeColor != appState.themeColor) {
            if (pagestate is Cloneable) {
              final Object copy = pagestate.clone();
              final GlobalBaseState newState = copy;
              newState.themeColor = appState.themeColor;
              return newState;
            }
          }
          return pagestate;
        });
      }

Widget pageViewItemBuilder(BuildContext context, int index) {
  if (index == 0) {
    return AccountPage().buildPage(null);
  } else if (index == 1) {
    return TranscationPage().buildPage(null);
  } else if (index == 2) {
    return PersonPage().buildPage(null);
  }
  return Text('页面跳转错误');

}

    this.connectExtraStore<GlobalState>(GlobalStore.store,
        (Object pageState, GlobalState appState) {
      debugPrint('克隆该页面');

      if (pageState is Cloneable) {
        final Object copy = pageState.clone();
        final GlobalAccountBaseState newState = copy;
        newState.totalAssets = appState.totalAssets;
        newState.netAssets = appState.netAssets;
        newState.debt = appState.debt;
        return newState;
      }
      return pageState;
    });