ExpandIcon constructor

const ExpandIcon({Key key, bool isExpanded: false, double size: 24.0, @required ValueChanged<bool> onPressed, EdgeInsetsGeometry padding: const EdgeInsets.all(8.0) })

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

Implementation 

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