import { TransformStream } from "https://deno.land/x/deno@v1.40.5/cli/tsc/dts/lib.dom.d.ts";
type
{ prototype: TransformStream; new <I = any, O = any>(): TransformStream<I, O>; }
transformer?: Transformer<I, O>,
writableStrategy?: QueuingStrategy<I>,
readableStrategy?: QueuingStrategy<O>,