function copyNimport { copyN } from "https://deno.land/x/denjucks@1.1.1/src/deps/path/std/io/ioutil.ts"; copyN(r: Reader,dest: Writer,size: number,): Promise<number>copy N size at the most. If read size is lesser than N, then returns nread Parametersr: Readerdest: Writersize: numberReturnsPromise<number>