bool is_fd() const;
bool is_j1939() const;
std::vector<std::shared_ptr<signal_t>>& get_signals();
+ uint32_t get_length() const;
+ message_format_t get_format() const;
void set_parent(std::shared_ptr<message_set_t> parent);
void set_last_value(std::shared_ptr<message_t> m);