anchor.diff:  ///     height: Theme.of(context).textTheme.display1.fontSize * 1.1 + 200.0,
   ///   ),
   ///   padding: const EdgeInsets.all(8.0),
  -///   color: Colors.teal.shade700,
  +///   color: Colors.blue[600],
   ///   alignment: Alignment.center,
  -///   child: Text('Hello World', style: Theme.of(context).textTheme.display1.copyWith(color: Colors.white)),
  -///   foregroundDecoration: BoxDecoration(
  -///     image: DecorationImage(
  -///       image: NetworkImage('https://www.example.com/images/frame.png'),
  -///       centerSlice: Rect.fromLTRB(270.0, 180.0, 1360.0, 730.0),
  -///     ),
  -///   ),
  +///   child: Text('Hello World',
  +///     style: Theme.of(context)
  +///         .textTheme
  +///         .display1
  +///         .copyWith(color: Colors.white)),
   ///   transform: Matrix4.rotationZ(0.1),
   /// )
   /// ```
  
positive.code: ///
  /// {@tool sample}
  ///
  /// This example shows a 48x48 green square (placed inside a [Center] widget in
  /// case the parent widget has its own opinions regarding the size that the
  /// [Container] should take), with a margin so that it stays away from
  /// neighboring widgets:
  
negative.code: /// Center(
  ///   child: Container(
  ///     margin: const EdgeInsets.all(10.0),
  ///     color: Colors.amber[600],
  ///     width: 48.0,
  ///     height: 48.0,
  ///   ),
  