code: def test_lfilter_9th_order_filter_stability(self):
      super().test_lfilter_9th_order_filter_stability()
  
file_path: audio/test/torchaudio_unittest/functional/functional_cuda_test.py
imports: import unittest
  import torch
  from torchaudio_unittest.common_utils import PytorchTestCase, skipIfNoCuda
  from .functional_impl import Functional, FunctionalCUDAOnly
label_desc: Use image node_id 1 for calling the TestFunctionalFloat32 obj's underlying member method code with example usage: obj.test_lfilter_9th_order_filter_stability() without return types