Mathis Dirksen-Thedens

In 4.0.2 this issue is not fixed, the API still does not adhere to the defined generics. I implemented a [(hopefully temporary) precaution so the correct type is returned](https://github.com/mathisdt/sdb2/commit/96dc9ae82899e9f9ef1556b1259d2d73bab408df#diff-e62ac8e105a8145ded3856dcb6bf8371ebe165288ac8fc8b25893c367a6026f0R160), but...

Thanks for the explanation, I use `Set` now (the type `Set