code: def setUpClass(cls):
      path = Path(cls.model_path)
      if path.exists():
          return
  
      path.parent.mkdir(parents=True, exist_ok=True)
      tqdl.download(
          "https://s3.amazonaws.com/bendropbox/ner_backwards_compatibility.jl",
          str(path),
      )
  
file_path: finetune/tests/test_backwards_compat.py
imports: import unittest
  from pathlib import Path
  import os
  import pytest
  import tqdl
  from finetune import SequenceLabeler
label_desc: Use image node_id 1 for calling the TestBackwardsCompatibility obj's underlying member method code with example usage: obj.setUpClass(cls) without return types