// MarshalBinary encodes the object to a binary format.
func (s *Series) MarshalBinary() ([]byte, error) {
	var pb internal.Series
	pb.Key = &s.Key
	for k, v := range s.Tags {
		key := k
		value := v
		pb.Tags = append(pb.Tags, &internal.Tag{Key: &key, Value: &value})
	}
	return proto.Marshal(&pb)
}

// UnmarshalBinary decodes the object from a binary format.
func (s *Series) UnmarshalBinary(buf []byte) error {
	var pb internal.Series
	if err := proto.Unmarshal(buf, &pb); err != nil {
		return err
	}
	s.Key = pb.GetKey()
	s.Tags = make(map[string]string)
	for _, t := range pb.Tags {
		s.Tags[t.GetKey()] = t.GetValue()
	}
	return nil
}