class PassThrough
extends Transform
import { PassThrough } from "https://deno.land/std@0.147.0/node/stream.ts";
The stream.PassThrough class is a trivial implementation of a Transform stream that simply passes the input bytes across to the output. Its purpose is
primarily for examples and testing, but there are some use cases wherestream.PassThrough is useful as a building block for novel sorts of streams.