如何在flutter中放置列表视图构建器项旁边的Widget？

ListView.builder(
  itemCount: itemCount,
  itemBuilder: (BuildContext context, int index) {
    return Row(
      children: [
        Expanded(
          child: ListTile(
            title: Text('Item $index'),
          ),
        ),
        Container(
          width: 50,
          height: 50,
          color: Colors.blue,
          child: Center(
            child: Text('Widget'),
          ),
        ),
      ],
    );
  },
)