function lensimport { lens } from "https://dotland.deno.dev/x/rambda@9.4.1/rambda.js"; lens<S, A>(getter: (s: S) => A, setter: (a: A, s: S) => S): Lens<S, A>It returns a lens for the given getter and setter functions. It returns a lens for the given getter and setter functions. The getter gets the value of the focus; the setter sets the value of the focus. The setter should not mutate the data structure. Type ParametersSAParametersgetter: (s: S) => Asetter: (a: A, s: S) => SReturnsLens<S, A>