import { type HashMultiMapHashValue } from "https://deno.land/x/rimbu@0.12.3/mod.ts";
const { NonEmpty } = HashMultiMapHashValue;
A non-empty type-invariant immutable MultiMap of key type K, and value type V. In the MultiMap, each key has at least one value. See the MultiMap documentation and the HashMultiMapHashValue API documentation