function copyBytesimport { copyBytes } from "https://deno.land/std@0.78.0/bytes/mod.ts"; copyBytes(src: Uint8Array,dst: Uint8Array,off?,): numberCopy bytes from one Uint8Array to another. Bytes from src which don't fit into dst will not be copied. Parameterssrc: Uint8ArraySource byte array dst: Uint8ArrayDestination byte array optionaloff = [UNSUPPORTED]Offset into dst at which to begin writing values from src. Returnsnumbernumber of bytes copied