Sliver.visibility constructor Null safety

Implementation

const factory Sliver.visibility({
  Key? key,
  required Sliver sliver,
  @Default(SliverToBoxAdapter()) Sliver replacementSliver,
  @Default(true) bool visible,
  @Default(false) bool maintainState,
  @Default(false) bool maintainAnimation,
  @Default(false) bool maintainSize,
  @Default(false) bool maintainSemantics,
  @Default(false) bool maintainInteractivity,
}) = SliverVisibility;