code: def __maybe_download_file(destination: str, source: str):
      """
      Downloads source to destination if not exists.
      If exists, skips download
      Args:
          destination: local filepath
          source: url of resource
      """
      source = URL[source]
      if not os.path.exists(destination):
          logging.info(f"Downloading {source} to {destination}")
          subprocess.run(["wget", "-O", destination, source])
          return 1
      else:
          logging.info(f"{destination} found. Skipping download")
          return 0
  
file_path: NeMo/examples/nlp/token_classification/data/get_libritts_data.py
imports: import argparse
  import glob
  import os
  import re
  import shutil
  import subprocess
  import tarfile
  from tqdm import tqdm
  from nemo.collections.nlp.data.token_classification.token_classification_utils import create_text_and_labels
  from nemo.utils import logging
label_desc: Use image node_id 2 for calling a global function with example usage: __maybe_download_file(destination, source) and returns: int, int