code: func (pc *ProbabilisticCounter) Bytes() ([]byte, error) {
  	bytes, err := pc.bitset.MarshalBinary()
  	if err != nil {
  		return nil, errors.Wrap(err, "Unable to serialize ProbabilisticCounter into binary data")
  	}
  	return bytes, nil
  }
docs: // It serializes this ProbabilisticCounter into a slice of bytes, which can be used to persist this data structure.