code: def test_get_timesteps(self):
      unprocessed_tokens = torch.tensor([2, 2, 0, 3, 3, 3, 0, 3])
      decoder = self._get_decoder()
      timesteps = decoder._get_timesteps(unprocessed_tokens)
  
      expected = [0, 3, 7]
      self.assertEqual(timesteps, expected)
  
imports: import itertools
  import torch
  from parameterized import parameterized
  from torchaudio_unittest.common_utils import get_asset_path, skipIfNoCtcDecoder, TempDirMixin, TorchaudioTestCase
label_desc: Use image node_id 11 for calling the CTCDecoderTest obj's underlying member method code with example usage: obj.test_get_timesteps() without return types