code: def setUpClass(cls):
      cls.onnx_model_dirs = {}
  
file_path: optimum/tests/onnxruntime/utils_onnxruntime_tests.py
imports: import shutil
  import tempfile
  import unittest
  from typing import Dict
  import numpy
  import torch
  from transformers import set_seed
  from optimum.exporters import TasksManager
label_desc: Use image node_id 1 for calling the ORTModelTestMixin obj's underlying member method code with example usage: obj.setUpClass(cls) without return types