Ah yeah, that's right, it was map[T]struct{} - it's been a bit since I had to do it. I knew it was something with curly brackets instead of the map[T]bool I st

Ah yeah, that's right, it was map[T]struct{} - it's been a bit since I had to do it. I knew it was something with curly brackets instead of the map[T]bool I started using.