Control.LensFunction
data L s a
Lens'
lens'
unit
pair
list
sequenceL
new
lift
lift2
liftT
liftLens
liftLens'
unlift
unlift2
unliftT
data R s a
observe
liftO
liftO2
unliftM
unliftM2
unliftMT
liftC
liftC2