title: Where are the gesture recognizers for the iOS 13 undo/redo gestures?
body: <p>New in iOS 13, three gestures are interpreted as asking for undo and redo:</p>
  
  <ul>
  <li><p>Double tap with three fingers means undo.</p></li>
  <li><p>Swipe left with three fingers means undo.</p></li>
  <li><p>Swift right with three fingers means redo.</p></li>
  </ul>
  
  <p>Where are the gesture recognizers that detect these gestures? What would I do to override them, turn them off, or arbitrate between them and my own gestures?</p>