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class LogicBoardDevice{ public:  /// FIXME Can I have a constructor that would be called before concretes?  /// Could use this to set up correct reference to UsbPorts.  unsigned char query();  /// Send the Message to the UsbPort.  unsigned char send(Message);   protected:  /// The message used to query the device.  Should be set in constructors.  Message& query_message; private:  UsbPort& usb_port;};