Method replace

packages/effect/src/Optic.ts:1131–1133

(a: A, _: S)

    this.set = set
  }
  override replace(a: A, _: S): S {
    return this.set(a)
  }
  override modify(f: (a: A) => A): (s: S) => S {
    return (s) => this.set(f(this.get(s)))
  }