func MustEncode(version VersionByte, src []byte) string {
	e, err := Encode(version, src)
	if err != nil {
		panic(err)
	}
	return e
}
func MustEncode(version VersionByte, src []byte) string {
	e, err := Encode(version, src)
	if err != nil {
		panic(err)
	}
	return e
}
// MustEncode is like Encode, but panics on error