code: def setUpClass(cls):
      super().setUpClass()
      cls.data = get_mock_dataset_fr(
          cls.root_dir, COMMONVOICE._ext_audio
      )
  
imports: import csv
  import os
  from pathlib import Path
  from typing import Dict, Tuple
  from torch import Tensor
  from torchaudio.datasets import COMMONVOICE
  from torchaudio_unittest.common_utils import get_whitenoise, normalize_wav, save_wav, TempDirMixin, TorchaudioTestCase
label_desc: Use image node_id 1 for calling the TestCommonVoiceFR obj's underlying member method code with example usage: obj.setUpClass(cls) without return types