anchor.diff:          actions: <Widget>[
             IconButton(
               icon: Icon(Icons.refresh),
  -            onPressed: () {},
  +            onPressed: _resetFields,
             )
           ],
         ), //AppBar
  
positive.code:                   labelStyle: TextStyle(color: Colors.green)), // InputDecoration
                textAlign: TextAlign.center,
                style: TextStyle(color: Colors.green, fontSize: 25.0),
              ), // TextField
              TextField(
                keyboardType: TextInputType.number,
  
negative.code:                   labelStyle: TextStyle(color: Colors.green)), // InputDecoration
                textAlign: TextAlign.center,
                style: TextStyle(color: Colors.green, fontSize: 25.0),
                controller: heightController,
              ), // TextField
              Padding(
                padding: EdgeInsets.only(top: 10.0, bottom: 10.0),
                child: Container(
                  height: 50.0,
                  child: RaisedButton(
                    onPressed: calculate,
                    child: Text("Calcular", style: TextStyle(color: Colors.white, fontSize: 25.0),),
                    color: Colors.green,
                  ), //RaisedButton,
                ),//Container,
              ),
              Text( _infoText ,
                textAlign: TextAlign.center,
                style: TextStyle(color: Colors.green, fontSize: 25.0),
              ) // Text
  