void set_action (ButtonID, std::string const& action_name, bool on_press, FaderPort::ButtonState = ButtonState (0));
std::string get_action (ButtonID, bool on_press, FaderPort::ButtonState = ButtonState (0));
void set_action (ButtonID, std::string const& action_name, bool on_press, FaderPort::ButtonState = ButtonState (0));
std::string get_action (ButtonID, bool on_press, FaderPort::ButtonState = ButtonState (0));