code: def increment_display_ref_count(self, amount: int=1):
          
          display_ref_count = self.__display_ref_count
          self.__display_ref_count += amount
          for display_data_channel in self.display_data_channels:
              display_data_channel.increment_display_ref_count(amount)
docs: Increment display reference count to indicate this library item is currently displayed.