Available behaviour: Forth, Range, Level, Start, Final, Depth.
Covariant Functor from Arrow into Arrow:
Covariant Functor from co-Kleisli/Kleisli Arrow into Arrow:
Covariant Functor from Kleisli Arrow into Kleisli Arrow:
Covariant Functor from co-Kleisli/Kleisli Arrow into Kleisli Arrow:
Some related natural transformations: