Cached Network Image In Flutter

Cached Network Image In Flutter :

dependencies:
cached_network_image:

Widget _sizedContainer(Widget child, Color color) {
  return new SizedBox(
    height: 150.0,
    child: new Container(
      child: new Center(child: child),
      color: color,
    ),
  );
}


       _sizedContainer(
                new CachedNetworkImage(
                  placeholder: (BuildContext context, String url) {
                    return CircularProgressIndicator();
                  },
                  imageUrl: 'image url',
                  errorWidget:
                      (BuildContext context, String url, Object error) {
                    return Icon(Icons.error);
                  },
                ),
                Colors.green),

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