Specifying of a subdirectory inside a bucket

[SergeyStorm]

Hello!

I'm trying to rotate backups inside a particular subdirectory, but seems there is no way to do that.
I store different backup trees in different subdirectories in one bucket and want to rotate them separately.
I tried to point subdirectory path via config file but seems it didn't help.
When I call collect_backups() inside the bucket I receive a complete list of all backups in all subdirectories.
I will be very grateful if you add such an opportunity.

Thanks for good job.