code: def register_module_fixer(
      target_class_or_classes: Union[type, Sequence[type]],
      validator_class: type = DEFAULT_MODULE_VALIDATOR,
  ):
      """
      Registers the decorated function as the ``fixer`` of ``target_class_or_classes``, which is
      the function that will be invoked every time you want to fix an incompatoble module to make
      it work for training with Opacus.
      You may supply your own validator_class that holds the registry of FIXERS.
      The signature of every fixer is always the same:
  
      >>> @register_module_fixer(MyCustomModel)
      ... def fix(module: nn.Module, **kwargs) -> nn.Module:
      ...    pass
  
      It may help you to take a look at the existing fixers inside Opacus, under ``opacus.validators.``
      """
  
      def decorator(f):
          target_classes = (
              target_class_or_classes
              if isinstance(target_class_or_classes, Sequence)
              else [target_class_or_classes]
          )
          for target_class in target_classes:
              validator_class.FIXERS[target_class] = f
          return f
  
      return decorator
  
label_desc: Use image node_id 2 for calling a global function with example usage: register_module_fixer(target_class_or_classes, validator_class) and returns: decorator, f