Dart APIunself_componentUnselfNavigationBarpadding padding property Null safety EdgeInsetsDirectional? padding final Implementation final EdgeInsetsDirectional? padding; unself_component unself_component UnselfNavigationBar padding 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 ==