Transform.rotate constructor

Transform.rotate({Key key, @required double angle, Offset origin, AlignmentGeometry alignment: Alignment.center, bool transformHitTests: true, Widget child })

Creates a widget that transforms its child using a rotation around the center.

The angle argument must not be null. It gives the rotation in clockwise radians.

This example rotates an orange box containing text around its center by fifteen degrees. 
Transform.rotate(
  angle: -math.pi / 12.0,
  child: Container(
    padding: const EdgeInsets.all(8.0),
    color: const Color(0xFFE8581C),
    child: const Text('Apartment for rent!'),
  ),
)

Implementation 

Transform.rotate({
  Key key,
  @required double angle,
  this.origin,
  this.alignment = Alignment.center,
  this.transformHitTests = true,
  Widget child,
}) : transform = Matrix4.rotationZ(angle),
     super(key: key, child: child);