OverflowBox({Key key, FractionalOffset alignment: FractionalOffset.center, double minWidth, double maxWidth, double minHeight, double maxHeight, Widget child })

Creates a widget that lets its child overflow itself.

Source 

OverflowBox({
  Key key,
  this.alignment: FractionalOffset.center,
  this.minWidth,
  this.maxWidth,
  this.minHeight,
  this.maxHeight,
  Widget child
}) : super(key: key, child: child);