code: def tts_normalizer():
      normalizer = Normalizer(
          lang="en",
          input_case="cased",
          overwrite_cache=True,
          cache_dir=None,
      )
      return normalizer
  
imports: import json
  import multiprocessing
  import os
  from dataclasses import dataclass, field
  from pathlib import Path
  import pytest
  from hydra.utils import instantiate
  from omegaconf import OmegaConf
  from nemo.collections.asr.data.text_to_text import TextToTextDataset, TextToTextItem, TextToTextIterableDataset
  from nemo.collections.common import tokenizers
label_desc: Use image node_id 5 for calling a global function with example usage: tts_normalizer() and returns: normalizer