Dart APIunself_componentNavigationContextNavigationContext const constructor NavigationContext constructor Null safety const NavigationContext({Key? key, required Widget child, Widget? exit} ) Implementation const NavigationContext({ super.key, required super.child, this.exit, }); unself_component unself_component NavigationContext NavigationContext const constructor NavigationContext class Constructors NavigationContext Properties child exit hashCode key runtimeType Methods createElement debugDescribeChildren debugFillProperties noSuchMethod toDiagnosticsNode toString toStringDeep toStringShallow toStringShort updateShouldNotify Operators operator == Static methods of