2to3 plan set default parameter

Is it possible to specify default-parameters within the migration-plan?

I want migrations to set the signing-service for my migrated debian-repositories. Then the migrated repositories would already have signed metadata.
If I change it afterwards, I also have to re-publish all the repos.

I thought about adding generic mechanisms to the 2to3-migrations, but due to the very generic way one can create repo-signatures in pulp2 I doubt this is possible.


Currently, it is not possible to specify any extra parameters in the migration plan but it is possible to extend the schema if optional parameters are added.