code: def test_flac_file(self, lazy_decode, num_channels):
      if lazy_decode:
          if "dev" in tf.__version__:
              self.skipTest(
                  "`tensorflow_io` is not compatible with `tf-nightly`"
              )
  
      dtype = np.int16
      file_format = "flac"
  
      np_audio = _create_np_audio(num_channels, dtype)
      _, tmp_file = tempfile.mkstemp()
      _write_audio_file(np_audio, tmp_file, file_format)
  
      self.assertFeature(
          feature=features.Audio(
              file_format=file_format,
              shape=_shape_for_channels(num_channels),
              dtype=dtype,
              lazy_decode=lazy_decode,
          ),
          shape=_shape_for_channels(num_channels),
          dtype=dtype,
          tests=[
              testing.FeatureExpectationItem(
                  value=tmp_file,
                  expected=np_audio,
              ),
              testing.FeatureExpectationItem(
                  value=pathlib.Path(tmp_file),
                  expected=np_audio,
              ),
          ],
          test_attributes=dict(
              _file_format=file_format,
          ),
      )
  
imports: import array
  import pathlib
  import tempfile
  from absl.testing import parameterized
  import numpy
  import pydub
  import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import features
label_desc: Use image node_id 4 for calling the AudioFeatureTest obj's underlying member method code with example usage: obj.test_flac_file(lazy_decode, num_channels) without return types