* Focuses **all elements** of an array-like focus and optionally narrows * to a subset using an element-level optic. * Available only on Traversal (i.e. when `A` is * `ReadonlyArray `). Returns a new Traversal focused on the * selected elements. * * **Details** *
(this: Traversal<S, A>, f: (iso: Iso<A, A>) => Optional<A, B>)
| 906 | * : Result.fail(issue) |
| 907 | * ) |
| 908 | * } |
| 909 | * |
| 910 | * atKey("x").getResult({ x: 1 }) // => Result.succeed(1) |
| 911 | * ``` |
no outgoing calls