code: def test_constructor_subword(self, tmp_tokenizer):
      cfg = CTCBPEDecodingConfig()
      decoding = CTCBPEDecoding(
          decoding_cfg=cfg, tokenizer=tmp_tokenizer
      )
      assert decoding is not None
  
file_path: NeMo/tests/collections/asr/decoding/test_ctc_decoding.py
imports: import os
  from functools import lru_cache
  import pytest
  import torch
  from omegaconf import DictConfig, OmegaConf
  from nemo.collections.asr.parts.mixins import mixins
  from nemo.collections.asr.parts.submodules.ctc_decoding import CTCBPEDecoding, CTCBPEDecodingConfig, CTCDecoding, CTCDecodingConfig
  from nemo.collections.asr.parts.utils.rnnt_utils import Hypothesis
label_desc: Use image node_id 2 for calling the TestCTCDecoding obj's underlying member method code with example usage: obj.test_constructor_subword(tmp_tokenizer) without return types