#6 how to compton shadow-exclude fluxboxtoolbar?

[bernhard]

I have been searching now for a while to no avail and only found a discussion from 2012 in one of the mailing lists...
Can someone please tell me how I can exclude the toolbar from compton shadows?
How can I match it with class or name or type?
I have tried a long list of possibilities and nothing seems to work.
Thank you.