I'm not sure if this is required. The line An ordered list of keys to use for restoring stale cache if no cache hit occurred for key already signifies what you are trying to add.

@vsvipul "list of keys" does not disclose that the keys can be prefixes to the keys.

@ELHoussineT Yes, I agree. In that case can we change that line itself to indicate that restore-keys are prefix matched?

Something like An ordered list of prefix-matched keys to use for restoring stale cache if no cache hit occurred for key

@vsvipul good idea.

Thank you for contributing 🎉