code: def test_flac(self, compression):
      self._smoke_test("flac", compression, check_num_frames=False)
  
imports: import unittest
  import torch
  import torchaudio.functional
  from parameterized import parameterized
  from torchaudio_unittest.common_utils import PytorchTestCase, skipIfNoSox, TorchaudioTestCase
  from .functional_impl import Functional, FunctionalCPUOnly
label_desc: Use image node_id 4 for calling the TestApplyCodec obj's underlying member method code with example usage: obj.test_flac(compression) without return types