code: func Defaults(key []byte, fips bool) (Encrypter, Decrypter) {
  	f := NewFernet(key)
  	if fips {
  		return f, f
  	}
  	n := NewNACLSecretbox(key)
  	return n, NewMultiDecrypter(n, f)
  }
docs: // Defaults returns a default encrypter and decrypter.  If the FIPS parameter is set to
  // true, the only algorithm supported on both the encrypter and decrypter will be fernet.