Amazingly enough, this image was on the Abus bike locks website; the annotations are mine. The way Abus locked it, the folding bike could be stolen with a hex wrench.
With bicycles always some part can be stolen with the right wrench...
It's funny bike nerdery to think what screws you would have to unlock to steal the bike. But in practice I don't think it makes a difference. If someone has enough time to remove your fork without destroying the bike, then there would be more than enough time to destroy the lock.