code: def test_sample_rate_property(self):
      self.assertEqual(
          features.Audio(sample_rate=1600).sample_rate, 1600
      )
  
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 6 for calling the AudioFeatureTest obj's underlying member method code with example usage: obj.test_sample_rate_property() without return types