import { io } from "https://deno.land/x/msgpack_rpc@v3.1.6/deps.ts";
const { BufReader } = io;
reads data into p. It returns the number of bytes read into p. The bytes are taken from at most one Read on the underlying Reader, hence n may be less than len(p). To read exactly len(p) bytes, use io.ReadFull(b, p).