ExpandIcon constructor Null safety

const ExpandIcon(
  1. {Key? key,
  2. bool isExpanded = false,
  3. double size = 24.0,
  4. required ValueChanged<bool>? onPressed,
  5. EdgeInsetsGeometry padding = const EdgeInsets.all(8.0),
  6. Color? color,
  7. Color? disabledColor,
  8. Color? expandedColor}
)

Creates an ExpandIcon with the given padding, and a callback that is triggered when the icon is pressed.

Implementation

const ExpandIcon({
  super.key,
  this.isExpanded = false,
  this.size = 24.0,
  required this.onPressed,
  this.padding = const EdgeInsets.all(8.0),
  this.color,
  this.disabledColor,
  this.expandedColor,
}) : assert(isExpanded != null),
     assert(size != null),
     assert(padding != null);