import { undefinable } from "https://deno.land/x/fun@v2.0.0-alpha.6/refinement.ts";
Type Parameters
B extends A
Parameters
or: Refinement<A, B>
Returns
Refinement<A | undefined, B | undefined>
x/fun/refinement.ts>undefinable
import { undefinable } from "https://deno.land/x/fun@v2.0.0-alpha.6/refinement.ts";