Nested Static Groups

I feel like i'm missing something here. Aren't nested groups supported in v9? I don't see how to add a computer group to a static group.
For example: If i have static groups called Lab1, Lab2, Lab3, etc. that all have specific computer assignments, then i'd like to have another static group called something like All Labs that have the static groups Lab1, Lab2, and so on. That way, if i want to push a config profile to all labs, i can just select All Labs as the scope, rather than listing all of the individual labs.