method BetterMap.prototype.filterimport { BetterMap } from "https://deno.land/x/bettermap@v1.1.0/mod.ts"; filter(fn: (v: V, k: K) => boolean): BetterMap<K, V>Array#filter but for a Map Parametersfn: (v: V, k: K) => boolean Function to be passed. ReturnsBetterMap<K, V>BetterMap with elements that passed.