How to use placeholder in CachedNetworkImage?

I want to add a placeholder of a progress bar while image is loading but for some reason it does not work.

My code

CachedNetworkImage(
  imageUrl: 'url',
  fit: BoxFit.cover,
  height: 100,
  width: 100,
  placeholder: CircularProgressIndicator(),
),

>Solution :

You can use progressIndicatorBuilder when image is loading like this

progressIndicatorBuilder:
                          (context, url, downloadProgress) => Container(
                        decoration: const BoxDecoration(
                          shape: BoxShape.circle,
                          color: Colors.white,
                        ),
                      ),

or try this for placeholder

placeholder: (context, url) => new CircularProgressIndicator(),