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Module

x/fun/mod.ts>map.KeyOf

A collection of algebraic data types, lenses, and schemables based on a light weight higher kinded type implementation. Written for deno.
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type alias map.KeyOf
import { type map } from "https://deno.land/x/fun@v2.0.0/mod.ts";
const { KeyOf } = map;
definition: U extends ReadonlyMap<infer B, infer _> ? B : never