Dart APIunself_componentUnAppPageslivers slivers property Null safety List<Widget> slivers final Implementation final List<Widget> slivers; unself_component unself_component UnAppPage slivers property UnAppPage class Constructors UnAppPage Properties description hashCode implyLeading isImmersive key leading name runtimeType slivers trailing Methods build createElement debugDescribeChildren debugFillProperties noSuchMethod toDiagnosticsNode toString toStringDeep toStringShallow toStringShort Operators operator ==