This is used internally by the Control.Lens.Iso.Iso code to provide
efficient access to the two functions that make up an isomorphism.
Constructors
Exchange (s -> a) (b -> t)
Instances2Profunctor, Functor
Profunctor (Exchange a b)Defined in lens-5.3.5 · Control.Lens.Internal.IsoFunctor (Exchange a b s)Defined in lens-5.3.5 · Control.Lens.Internal.Iso