inline bool operator==(const SignedId &other) const { return id == other.id; }
inline bool operator!=(const SignedId &other) const { return id != other.id; }
inline bool operator<(const SignedId &other) const { return id < other.id; }
inline bool operator==(const SignedId &other) const { return id == other.id; }
inline bool operator!=(const SignedId &other) const { return id != other.id; }
inline bool operator<(const SignedId &other) const { return id < other.id; }