title: XCUITest interact with a Notification Banner.
body: <p>Is it possible in XCUITest to validate that a notification banner is sent to the screen? </p>
  
  <p>I can add an accessibility identifier to the notification, but I am having a problem getting XCUITest to interact with it when the banner is ent to the screen.  I know that XCUITest runs in a separate process from the app, but was wondeering if it was still possible to interact with the notification or is it beyond the scope of XCUITest?</p>
  
  <p>Thanks,</p>