anchor.diff:           ),
         ],
       ),
  +  ),
  +  floatingActionButton: FloatingActionButton(
  +    onPressed: _incrementCounter,
  +    tooltip: 'Increment',
  +    child: Icon(Icons.add),
     ),
   );
   ```
  
positive.code:     title: Text(widget.title),
    ),
    body: Center(
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
  
negative.code:       ],
        mainAxisAlignment: MainAxisAlignment.center,
      ),
    ),
    floatingActionButton: FloatingActionButton(
      child: Icon(Icons.add),
      onPressed: _incrementCounter,
      tooltip: 'Increment',
    ),
  );
  ```
  