DecoratedBox constructor

const DecoratedBox({Key key, @required Decoration decoration, DecorationPosition position: DecorationPosition.background, Widget child })

Creates a widget that paints a Decoration.

The decoration and position arguments must not be null. By default the decoration paints behind the child.

Implementation 

const DecoratedBox({
  Key key,
  @required this.decoration,
  this.position = DecorationPosition.background,
  Widget child
}) : assert(decoration != null),
     assert(position != null),
     super(key: key, child: child);