Dart APIunself_componentUnselfSliverNavigationBarautomaticallyImplyLeading automaticallyImplyLeading property Null safety bool automaticallyImplyLeading final Implementation final bool automaticallyImplyLeading; unself_component unself_component UnselfSliverNavigationBar automaticallyImplyLeading property UnselfSliverNavigationBar class Constructors UnselfSliverNavigationBar Properties automaticallyImplyLeading automaticallyImplyTitle backgroundColor border brightness hashCode heroTag key largeTitle leading middle opaque padding previousPageTitle runtimeType stretch trailing transitionBetweenRoutes Methods createElement createState debugDescribeChildren debugFillProperties noSuchMethod toDiagnosticsNode toString toStringDeep toStringShallow toStringShort Operators operator ==