builder property Null safety
final
A builder that builds the widget tree for the CupertinoModalPopupRoute.
The builder argument typically builds a CupertinoActionSheet widget.
Content below the widget is dimmed with a ModalBarrier. The widget built
by the builder does not share a context with the route it was originally
built from. Use a StatefulBuilder or a custom StatefulWidget if the
widget needs to update dynamically.
Implementation
final WidgetBuilder builder;