This would be really helpful.
For example I am working on two sets of tabs, which represents some aspect of app. First set have 5 tabs related to some backend feature. Second set have 6 tabs related to some other front end feature.
What I would like to have is that I could make a group of tabs (one is for backend and another for frontend) and then activate (open) one of them while hiding other(s).
That would be extremely useful.