code: def _saveTestWavFile(self, filename, wav_data):
      with open(filename, "wb") as f:
          f.write(wav_data)
  
file_path: tensorflow/tensorflow/examples/speech_commands/wav_to_features_test.py
imports: import os
  import tensorflow
  from tensorflow.examples.speech_commands import wav_to_features
  from tensorflow.python.framework import test_util
  from tensorflow.python.platform import test
label_desc: Use image node_id 2 for calling the WavToFeaturesTest obj's underlying member method code with example usage: obj._saveTestWavFile(filename, wav_data) without return types