code: def tearDown(self):
      shutil.rmtree(self.tmpdirname)
  
imports: import json
  import os
  import shutil
  import tempfile
  import unittest
  from transformers.models.wav2vec2 import Wav2Vec2CTCTokenizer, Wav2Vec2FeatureExtractor, Wav2Vec2Processor
  from transformers.models.wav2vec2.tokenization_wav2vec2 import VOCAB_FILES_NAMES
  from transformers.utils import FEATURE_EXTRACTOR_NAME
  from .test_feature_extraction_wav2vec2 import floats_list
label_desc: Use image node_id 4 for calling the Wav2Vec2ProcessorTest obj's underlying member method code with example usage: obj.tearDown() without return types