redo method

void redo()

It will remove last reverted actions and add it into _latestActions Then, it will modify the real points with the last reverted action.

Implementation

void redo() {
  if (_revertedActions.isNotEmpty) {
    final List<Point> lastRevertedAction = _revertedActions.removeLast();
    _latestActions.add(<Point>[...lastRevertedAction]);
    points = <Point>[...lastRevertedAction];
    notifyListeners();
    return;
  }
}