SliverGridDelegate.count constructor Null safety
Implementation
const factory SliverGridDelegate.count({
required int crossAxisCount,
@Default(0.0) double mainAxisSpacing,
@Default(0.0) double crossAxisSpacing,
@Default(1.0) double childAspectRatio,
double? mainAxisExtent,
}) = SliverGridDelegateWithFixedCrossAxisCount;