Wrap constructor
      
      Wrap({ 
    
- Axis direction = Axis.horizontal,
- WrapAlignment alignment = WrapAlignment.start,
- double spacing = 0.0,
- WrapAlignment runAlignment = WrapAlignment.start,
- double runSpacing = 0.0,
- WrapCrossAlignment crossAxisAlignment = WrapCrossAlignment.start,
- VerticalDirection verticalDirection = VerticalDirection.down,
- List<Widget> children = const <Widget>[],
Creates a wrap layout.
Implementation
Wrap({
  this.direction = Axis.horizontal,
  this.alignment = WrapAlignment.start,
  this.spacing = 0.0,
  this.runAlignment = WrapAlignment.start,
  this.runSpacing = 0.0,
  this.crossAxisAlignment = WrapCrossAlignment.start,
  this.verticalDirection = VerticalDirection.down,
  List<Widget> children = const <Widget>[],
}) : super(children: children);