code: def _torch_nn_module(obj: torch.nn.Module) -> str:
      return f"torch.nn.Module({obj.__class__.__name__})"
  
imports: from __future__ import annotations
  import dataclasses
  import functools
  import logging
  from typing import Any, Optional
  import onnxscript
  from onnxscript.function_libs.torch_lib import graph_building
  import torch
  import torch.fx
  from torch.onnx._internal import diagnostics
  from torch.onnx._internal.diagnostics import infra
  from torch.onnx._internal.diagnostics.infra import decorator, formatter
  from torch.onnx._internal.fx import registration, type_utils
label_desc: Use image node_id 4 for calling a global function with example usage: _torch_nn_module(obj) and returns: str, obj, str