restore snapshot sub-site as a main site?

Hello,

Is it possible to restore a snapshot of sub-site as a main site? Here's what I mean:

WP multi-site main site = domain.com
A subsite within that multisite = sub.domain.com
Domain mapping is on so the sub.domain.com maps to customdomain.com

Say I change my mind and I want to make customdomain.com the main site of the multi-site. Can I do this with Snapshot?