问如何禁用颤振网的景观模式？

EN

  Widget build(BuildContext context) => ResponsiveSizer(
        builder: (context, orientation, screenType) {
          if (screenType == ScreenType.mobile) {
            SystemChrome.setPreferredOrientations(
                [DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]);
          }

          return MaterialApp(
            title: 'App Title',
            debugShowCheckedModeBanner: false,
            theme: AppTheme.lightTheme,
            home: const HomePage(),
          );
        },
      );