class Peekable extends Iterator<T>import { Peekable } from "https://deno.land/x/ahh@v0.12.1/src/iterator.ts"; See Iterator.peekable. ConstructorsnewPeekable(iter: Iterator<T>)Type ParametersTMethodsnext(): Option<T>nextIf(fn: (_: T) => boolean): Option<T>Returns the next item if fn returns true. peek(): Option<T>Returns the next item without consuming it.