NestedScrollView constructor Null safety
Implementation
const factory NestedScrollView(
{final Key? key,
final Axis scrollDirection,
final bool reverse,
final ScrollPhysics? physics,
required final List<Sliver> slivers,
final List<Sliver>? innerBoxIsScrolledSlivers,
required final Widget body,
final bool floatHeaderSlivers,
final Clip clipBehavior,
final String? restorationId}) = _$NestedScrollView;