import { BufReader } from "https://deno.land/x/servest@v1.3.4/vendor/https/deno.land/std/io/bufio.ts";
return new BufReader unless r is BufReader
import { BufReader } from "https://deno.land/x/servest@v1.3.4/vendor/https/deno.land/std/io/bufio.ts";
return new BufReader unless r is BufReader