I removed all generics methods in Arraymancer, instead all my inherited types carry their "handler" proc in a field.
I had a showstopper issue with generic methods not able to resolve variant fields in Arraymancer for custom inherited types unless that custom inherited type was also generic ([https://github.com/mratsim/Arraymancer/issues/327)](https://github.com/mratsim/Arraymancer/issues/327\)).
