如何在控制器反向上更改颤动中的CurvedAnimation？

import 'package:flutter/material.dart';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> with SingleTickerProviderStateMixin {
  AnimationController _controller;
  CurvedAnimation _curvedAnimation;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(duration: Duration(seconds: 2), vsync: this);
    _curvedAnimation = CurvedAnimation(parent: _controller, curve: Curves.easeInOut);
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  void reverseAnimation() {
    _controller.reverse();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Reverse Animation'),
      ),
      body: Center(
        child: RaisedButton(
          child: Text('Reverse'),
          onPressed: reverseAnimation,
        ),
      ),
    );
  }
}