Flutter:如何将拇指图像添加到幻灯片中？

dependencies:
  carousel_slider: ^4.0.0

import 'package:flutter/material.dart';
import 'package:carousel_slider/carousel_slider.dart';

class ThumbSlider extends StatefulWidget {
  @override
  _ThumbSliderState createState() => _ThumbSliderState();
}

class _ThumbSliderState extends State<ThumbSlider> {
  List<String> thumbImages = [
    'assets/thumb1.png',
    'assets/thumb2.png',
    'assets/thumb3.png',
  ];

  @override
  Widget build(BuildContext context) {
    return CarouselSlider(
      items: thumbImages.map((thumbImage) {
        return Builder(
          builder: (BuildContext context) {
            return Container(
              width: MediaQuery.of(context).size.width,
              margin: EdgeInsets.symmetric(horizontal: 5.0),
              decoration: BoxDecoration(
                color: Colors.grey,
              ),
              child: Image.asset(
                thumbImage,
                fit: BoxFit.cover,
              ),
            );
          },
        );
      }).toList(),
      options: CarouselOptions(
        height: 200,
        aspectRatio: 16/9,
        viewportFraction: 0.8,
        initialPage: 0,
        enableInfiniteScroll: true,
        reverse: false,
        autoPlay: true,
        autoPlayInterval: Duration(seconds: 3),
        autoPlayAnimationDuration: Duration(milliseconds: 800),
        autoPlayCurve: Curves.fastOutSlowIn,
        enlargeCenterPage: true,
        onPageChanged: (index, reason) {
          // 当幻灯片滑动时触发的回调函数
        },
        scrollDirection: Axis.horizontal,
      ),
    );
  }
}