just made it

FlippR-Driver/src/utility/OutputGPIOInterface.cpp

@@ -108,6 +108,7 @@ void OutputGPIOInterface::deactivate_output_item(IOutputItem *item)
 
 void OutputGPIOInterface::write_display(IDisplay &display)
 {
+
 }
 
 }

FlippR-Driver/src/utility/OutputGPIOInterface.h

@@ -45,13 +45,12 @@ private:
   void parse_pins_driver_board(json &driver_board_config);
   void parse_pins_sound(json &sound_board_config);
   void parse_pins_display(json &display_board_config);
+
   void initialize_i2c_addresses();
 
   void initialize_pins();
   void initialize_all_pins(u_int8_t pin_base);
 
-  void activate(output::items::IOutputItem outputItem);
-
 private:
   std::mutex output_item_mutex;