function reduce_import { reduce_ } from "https://deno.land/x/itertools@v1.1.1/builtins.ts"; reduce_<T>(iterable: Iterable<T>, reducer: (a: T,v: T,i: number,) => T): Maybe<T>See reduce(). Type ParametersTParametersiterable: Iterable<T>reducer: (a: T,v: T,i: number,) => TReturnsMaybe<T>