Yep, I couldn't find any other proper way of detecting this — if there is an empty ruleset then it is obvious they're not removed, but we can't detect the `true` falue properly. So, there are only two variants:1. Make it true by default. 2. Detect only the faulty one and don't set anything for this option otherwise.But the second variant is useless: it is not different from the unset option, so I used the first variant.