code: def __call__(
      self, module, state_dict, prefix, local_metadata
  ) -> None:
      if "spectral_norm" not in local_metadata:
          local_metadata["spectral_norm"] = {}
      key = self.fn.name + ".version"
      if key in local_metadata["spectral_norm"]:
          raise RuntimeError(
              f"Unexpected key in metadata['spectral_norm']: {key}"
          )
      local_metadata["spectral_norm"][key] = self.fn._version
  
file_path: pytorch/torch/nn/utils/spectral_norm.py
imports: import torch
  from torch.nn.functional import normalize
  from typing import Any, Optional, TypeVar
  from ..modules import Module
label_desc: Use image node_id 2 for calling the SpectralNormStateDictHook obj's underlying member method code with example usage: obj.__call__(module, state_dict, prefix, local_metadata) without return types