virtual unsigned add_loco(unsigned, const std::string &, const VehicleType &);
virtual void remove_loco(unsigned);
virtual void set_loco_speed(unsigned, unsigned);
virtual void set_loco_reverse(unsigned, bool);
virtual void set_loco_function(unsigned, unsigned, bool);
virtual unsigned add_loco(unsigned, const std::string &, const VehicleType &);
virtual void remove_loco(unsigned);
virtual void set_loco_speed(unsigned, unsigned);
virtual void set_loco_reverse(unsigned, bool);
virtual void set_loco_function(unsigned, unsigned, bool);