SliverLayoutBuilderModifier constructor
      const
      SliverLayoutBuilderModifier({ 
    
- Key? key,
- Widget? child,
- Key? modifierKey,
- required SliverLayoutWidgetModifierBuilder builder,
Creates a sliver widget that defers its building until layout.
The builder argument must not be null.
Implementation
const SliverLayoutBuilderModifier({
  super.key,
  super.child,
  super.modifierKey,
  required this.builder,
});