Instances for typeclasses with a Contravariant, e.g.
Instances for typeclasses with a Contravariant, e.g. encoders.
Instances for typeclasses with a MonadError[?, String], i.e.
Instances for typeclasses with a MonadError[?, String], i.e. a
disjunction kleisli arrow applied to the typeclass. e.g. decoders.