anchor.diff:      e.deltaMode,
       e.deltaY,
       e.deltaZ,
  -  );
  -}
  +  )
  +    // ignore: invalid_use_of_protected_member
  +    ..$$jsPersistDoNotSetThisOrYouWillBeFired = () => e.persist();
  +}
  
positive.code:     e.screenX,
      e.screenY,
      e.shiftKey,
    );
  }
  
  /// Wrapper for [SyntheticTouchEvent].
  
negative.code: /// Wrapper for [SyntheticEvent].
  SyntheticEvent syntheticEventFactory(events.SyntheticEvent e) {
    return new SyntheticEvent(e.bubbles, e.cancelable, e.currentTarget, e.defaultPrevented, () => e.preventDefault(),
        () => e.stopPropagation(), e.eventPhase, e.isTrusted, e.nativeEvent, e.target, e.timeStamp, e.type)
      // ignore: invalid_use_of_protected_member
      ..$$jsPersistDoNotSetThisOrYouWillBeFired = () => e.persist();
  }
  
  /// Wrapper for [SyntheticClipboardEvent].
  