code: def RegisterOutput(cls, output_class, disabled=False):
      
      output_name = output_class.NAME.lower()
  
      if disabled:
        class_dict = cls._disabled_output_classes
      else:
        class_dict = cls._output_classes
  
      if output_name in class_dict:
        raise KeyError((
            'Output class already set for name: {0:s}.').format(
                output_class.NAME))
  
      class_dict[output_name] = output_class
docs: Registers an output class.
  
      The output classes are identified based on their NAME attribute.
  
      Args:
        output_class (type): output module class.
        disabled (Optional[bool]): True if the output module is disabled due to
            the module not loading correctly or not.
  
      Raises:
        KeyError: if output class is already set for the corresponding name.