Align constructor

const Align({Key key, AlignmentGeometry alignment: Alignment.center, double widthFactor, double heightFactor, Widget child })

Creates an alignment widget.

The alignment defaults to Alignment.center.

Implementation 

const Align({
  Key key,
  this.alignment = Alignment.center,
  this.widthFactor,
  this.heightFactor,
  Widget child
}) : assert(alignment != null),
     assert(widthFactor == null || widthFactor >= 0.0),
     assert(heightFactor == null || heightFactor >= 0.0),
     super(key: key, child: child);