Minor feature request: Add a var to $ENV{} for vzdump-hook scripts to use

Would it be possible to add a var for use in hook scripts similar to $ENV{DUMPDIR} but that specifies the name of the Storage ID that was used for the backup? $ENV{STORID} ??

I've looked through some of the vzdump source code and didn't see anything like that available already, but apologies if I just missed it.

TIA for considering.