.swift

  return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Row(
          children: stars,
        ),
        FlatButton(
          child: Text("Clear", style: TextStyle(color: Colors.blue)),
          onPressed: () {
            setState(() {
              _currentRating = 0;
            });
            this.widget.onRatingSelected(_currentRating);
          },
        )
      ],
    );