docs: public static long copyStream(OutputStream dst, InputStream src) throws IOException {
  		long copied;
  
  		if (dst instanceof FileOutputStream && src instanceof FileInputStream) {
  			try (FileChannel dstChannel = ((FileOutputStream) dst).getChannel();
  					FileChannel srcChannel = ((FileInputStream) src).getChannel()) {
  				copied = copyStreamChannel(dstChannel, srcChannel);
  			}
  		} else {
  			copied = copyStreamStandard(dst, src);
  		}
  		return copied;
  	}