ServiceLens

alias to set

Composes two lenses, this enables nesting.

If our field of type A has a sub-field of type B, then given a lens for it (other: Lens[A, B]) we can create a single lens from Container to B.

Creates a sub-lens

Creates a sub-lens

Represent an update operator (like x.y += 1 )

Optional assignment.

Given a Some[A], assign the Some's value to the field. Given None, the container is unchanged.

Given two lenses with the same origin, returns a new lens that can mutate both values represented by both lenses through a tuple.