How to restore form an old version backup

Hi, great job.
    I'm also meet backup situation.  I am wondering we need able to restore from an older version of backup,  in case of app database already upgraded.   I am not found this feature in room's APIS.


backup database at version 1
app database upgrade from 1 to 2 due to App upgrade.
restore form backup,   and auto migration from 1 to 2. 