SliverChildDelegate.fixed constructor Null safety
Implementation
const factory SliverChildDelegate.fixed(
List<Widget> children, {
@Default(true) bool addAutomaticKeepAlives,
@Default(true) bool addRepaintBoundaries,
@Default(true) bool addSemanticIndexes,
@Default(0) int semanticIndexOffset,
}) = SliverChildListDelegateFixed;