import { BufWriter } from "https://deno.land/x/denjucks@1.1.1/src/deps/path/std/io/bufio.ts";
return new BufWriter unless writer is BufWriter
import { BufWriter } from "https://deno.land/x/denjucks@1.1.1/src/deps/path/std/io/bufio.ts";
return new BufWriter unless writer is BufWriter