CupertinoModalPopupRoute<T>  constructor 
    Null safety
- {required WidgetBuilder builder,
- String barrierLabel = 'Dismiss',
- Color? barrierColor = kCupertinoModalBarrierColor,
- bool barrierDismissible = true,
- bool? semanticsDismissible,
- ImageFilter? filter,
- RouteSettings? settings,
- Offset? anchorPoint}
A route that shows a modal iOS-style popup that slides up from the bottom of the screen.
Implementation
CupertinoModalPopupRoute({
  required this.builder,
  this.barrierLabel = 'Dismiss',
  this.barrierColor = kCupertinoModalBarrierColor,
  bool barrierDismissible = true,
  bool? semanticsDismissible,
  super.filter,
  super.settings,
  this.anchorPoint,
}) {
  _barrierDismissible = barrierDismissible;
  _semanticsDismissible = semanticsDismissible;
}