flutter network image show loading indicator

1Image.network(
2          'https://previews.123rf.com/images/blueringmedia/blueringmedia1701/blueringmedia170100692/69125003-colorful-kite-flying-in-blue-sky-illustration.jpg',
3          loadingBuilder: (BuildContext context, Widget child,
4              ImageChunkEvent loadingProgress) {
5            if (loadingProgress == null) return child;
6            return Center(
7              child: CircularProgressIndicator(
8                value: loadingProgress.expectedTotalBytes != null
9                    ? loadingProgress.cumulativeBytesLoaded /
10                        loadingProgress.expectedTotalBytes
11                    : null,
12              ),
13            );
14          },
15        ),
16