paxos_protocol::status heartbeat(int &r, std::string m, unsigned instance);
std::string value(const std::vector<std::string> &mems) const;
void members(const std::string &v, std::vector<std::string> &m) const;
paxos_protocol::status heartbeat(int &r, std::string m, unsigned instance);
std::string value(const std::vector<std::string> &mems) const;
void members(const std::string &v, std::vector<std::string> &m) const;