import { MultiMapNonEmpty } from "https://deno.land/x/rimbu@1.0.2/multimap/custom/index.ts";
Parameters
options: { ifNew?: OptLazy<StreamSource<V>>; ifExists?: (currentValues: TpG["keyMapValuesNonEmpty"]) => StreamSource<V>; }
import { MultiMapNonEmpty } from "https://deno.land/x/rimbu@1.0.2/multimap/custom/index.ts";