HarmonyOS 提供获取屏幕底部安全区的高度了吗？

onPageShow() {  
  AppStorage.setOrCreate("nav", this.pathInfos);  
  let windowStage = AppStorage.get("windowStage") as window.WindowStage;  
  console.info("zzzzz "+JSON.stringify(windowStage.getMainWindowSync().getWindowAvoidArea(window.AvoidAreaType.TYPE_NAVIGATION_INDICATOR)));  
}