function readExactimport { readExact } from "https://dotland.deno.dev/std@0.116.0/encoding/binary.ts"; readExact(r: Deno.Reader, b: Uint8Array): Promise<void>Reads the exact number of bytes from r required to fill b. Reads the exact number of bytes from r required to fill b. Throws Deno.errors.UnexpectedEof if n bytes cannot be read. Parametersr: Deno.Readerb: Uint8ArrayReturnsPromise<void>