code: func UntarUncompressed(tarArchive io.Reader, dest string, options *TarOptions) error {
  	return untarHandler(tarArchive, dest, options, false)
  }
docs: // UntarUncompressed reads a stream of bytes from `archive`, parses it as a tar archive,
  // and unpacks it into the directory at `dest`.
  // The archive must be an uncompressed stream.