import { BufReader } from "https://deno.land/x/abc@v1.3.3/vendor/https/deno.land/std/io/bufio.ts";
return new BufReader unless r is BufReader
import { BufReader } from "https://deno.land/x/abc@v1.3.3/vendor/https/deno.land/std/io/bufio.ts";
return new BufReader unless r is BufReader