Dart APIunself_componentUnSheetuseRootNavigator useRootNavigator property Null safety bool useRootNavigator final Implementation final bool useRootNavigator; unself_component unself_component UnSheet<T> useRootNavigator property UnSheet class Constructors UnSheet Properties animationCurve arguments backgroundColor barrierColor bounce child clipBehavior closeProgressThreshold duration elevation enableDrag expand hashCode isDismissible key name overlayStyle previousRouteAnimationCurve restorationId runtimeType secondAnimation settings shadow shape topRadius transitionBackgroundColor useRootNavigator Methods canUpdate createRoute noSuchMethod toString Operators operator ==