import { BufWriter } from "https://dotland.deno.dev/x/proc@0.21.9/legacy/deps.ts";
return new BufWriter unless writer is BufWriter
Parameters
writer: Writer
import { BufWriter } from "https://dotland.deno.dev/x/proc@0.21.9/legacy/deps.ts";
return new BufWriter unless writer is BufWriter