BackButtonListener constructor Null safety

const BackButtonListener(
  1. {Key? key,
  2. required Widget child,
  3. required ValueGetter<Future<bool>> onBackButtonPressed}
)

Creates a BackButtonListener widget .

The child and onBackButtonPressed arguments must not be null.

Implementation

const BackButtonListener({
  super.key,
  required this.child,
  required this.onBackButtonPressed,
});