page中怎么获取WindowStage

onWindowStageCreate(windowStage: window.WindowStage): void { 
  // Main window is created, set main page for this ability 
  hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onWindowStageCreate'); 
 
  windowStage.loadContent('pages/Page6', (err, data) => { 
 
    if (err.code) { 
      hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? ''); 
      return; 
    } 
    AppStorage.setOrCreate('windowStage',windowStage); 
 
    hilog.info(0x0000, 'testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? ''); 
  }); 
}
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