OK; I confess
OK, OK: the original code actually used a Map instead of a Set.
For some reason I never used Set's; I would always use a Map and then Map.contains().
It is only in the last few years I started using a Set.
There, go and laugh now :)
I don't know; you just can get the senior staff nowadays :)
Come one; share the fun; what cringeworthy things do you do?