Avoid useless vector coping by move semantic and using referenceness qualifier #95

const std::vector<uint8_t> &BlaBla::toBuffer() const {
  return data_;
}

std::vector<uint8_t> vec = BlaBla().toBuffer(); // <= copy here

const std::vector<uint8_t> &BlaBla::toBuffer() const & { // <= method for case of usual object
    return data_;
  }
std::vector<uint8_t> BlaBla::toBuffer() const && { // <= method for case of temp object
  return std::move(data_);
}
std::vector<uint8_t> &BlaBla::asBuffer() { // <= method to access internal vector
  return data_;
}
const std::vector<uint8_t> &BlaBla::asBuffer() const { // <= method to RO-access internal vector
  return data_;
}