Dart APIunself_componentUnselfNavigationBartransitionBetweenRoutes transitionBetweenRoutes property Null safety bool transitionBetweenRoutes final Implementation final bool transitionBetweenRoutes; unself_component unself_component UnselfNavigationBar transitionBetweenRoutes property UnselfNavigationBar class Constructors UnselfNavigationBar Properties automaticallyImplyLeading automaticallyImplyMiddle backgroundColor border brightness hashCode heroTag key leading middle padding preferredSize previousPageTitle runtimeType trailing transitionBetweenRoutes Methods createElement createState debugDescribeChildren debugFillProperties noSuchMethod shouldFullyObstruct toDiagnosticsNode toString toStringDeep toStringShallow toStringShort Operators operator ==