code: def _get_mscoco(directory):
    
    for url in _MSCOCO_URLS:
      filename = os.path.basename(url)
      download_url = os.path.join(_MSCOCO_ROOT_URL, url)
      path = generator_utils.maybe_download(directory, filename, download_url)
      unzip_dir = os.path.join(directory, filename.strip(".zip"))
      if not tf.gfile.Exists(unzip_dir):
        zipfile.ZipFile(path, "r").extractall(directory)
docs: Download and extract MSCOCO datasets to directory unless it is there.