import { type optic } from "https://deno.land/x/fun@v2.0.0/mod.ts";
const { AffineTag } = optic;
import { optic } from "https://deno.land/x/fun@v2.0.0/mod.ts";
const { AffineTag } = optic;
A runtime tag and type that indicates an Optic has a view function of the form
(s: S) => Option<A>
.