code: def test_construct_basic_decoder(self, tokens, lm, use_lexicon):
      self._get_decoder(tokens=tokens, lm=lm, use_lexicon=use_lexicon)
  
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 5 for calling the CTCDecoderTest obj's underlying member method code with example usage: obj.test_construct_basic_decoder(tokens, lm, use_lexicon) without return types