Find node group's users (material)


I wonder if there is a way to find the users of a node group (material) ?
I have a blend file which contains a lot of node groups and I would like to find the materials which use a specific node group.
I can get a list of the available node groups inside the outliner under “data API” or “Blend file”.
But how to list the users of the node groups ?

I know there is an addon but it doesn’t work above Blender 2.79.

Here : How to find the users of a node goup (material)?

Maybe with Python ?

Thanks a lot for your help.

Got the addon working again. Will post update maybe tomorrow after a few more tweaks to it.

It’s very nice, thank you very much !!

Hello AFWS,

Any news about the update of your addon ?