virtual const char *ToString(const cec_menu_state state) = 0;
virtual const char *ToString(const cec_version version) = 0;
virtual const char *ToString(const cec_power_status status) = 0;
virtual const char *ToString(const cec_menu_state state) = 0;
virtual const char *ToString(const cec_version version) = 0;
virtual const char *ToString(const cec_power_status status) = 0;