class_docstr: Test suite for classes defined in `transforms` module
class_docstr_tok: ["Test","suite","for","classes","defined","in","`","transforms","`","module"]
code: def test_batch_TimeStretch(self):
      rate = 2
      num_freq = 1025
      batch = 3
  
      tensor = common_utils.get_whitenoise(
          sample_rate=8000, n_channels=batch
      )
      spec = common_utils.get_spectrogram(tensor, n_fft=num_freq)
      transform = T.TimeStretch(
          fixed_rate=rate, n_freq=num_freq // 2 + 1, hop_length=512
      )
  
      self.assert_batch_consistency(
          transform, spec, atol=1e-5, rtol=1e-5
      )
  
imports: import os
  import torch
  from parameterized import parameterized
  from torchaudio import transforms
  from torchaudio_unittest import common_utils
label_desc: Use image node_id 13 for calling the TestTransforms obj's underlying member method code with example usage: obj.test_batch_TimeStretch() without return types