Visual indication of which nodes use node context

I have a couple of messy flows which I have to return to from time to time for update / debug. A couple of the nodes use context variables which are useful in debugging, but there is no indication of where this is the case. Perhaps there could be an indicator on nodes which have node scoped context to show this.
Having just written that I've just realised that I could just do something like prefix the node name with a * to indicate that it has context but I'll leave this here anyway, in case I've missed another trick.