func (b Base64) MarshalText() ([]byte, error) {
	enc := base64.URLEncoding
	src := []byte(b)
	buf := make([]byte, enc.EncodedLen(len(src)))
	enc.Encode(buf, src)
	return buf, nil
}
func (b Base64) MarshalText() ([]byte, error) {
	enc := base64.URLEncoding
	src := []byte(b)
	buf := make([]byte, enc.EncodedLen(len(src)))
	enc.Encode(buf, src)
	return buf, nil
}
// MarshalText turns this instance into text