docs: def _download_file_from_drive(filename, url):  # pragma: no cover
      """ Download filename from google drive unless it's already in directory.
  
      Args:
          filename (str): Name of the file to download to (do nothing if it already exists).
          url (str): URL to download from.
      """
      confirm_token = None
  
      # Since the file is big, drive will scan it for virus and take it to a
      # warning page. We find the confirm token on this page and append it to the
      # URL to start the download process.
      confirm_token = None
      session = requests.Session()
      response = session.get(url, stream=True)
      for k, v in response.cookies.items():
          if k.startswith("download_warning"):
              confirm_token = v
  
      if confirm_token:
          url = url + "&confirm=" + confirm_token
  
      logger.info("Downloading %s to %s" % (url, filename))
  
      response = session.get(url, stream=True)
      # Now begin the download.
      chunk_size = 16 * 1024
      with open(filename, "wb") as f:
          for chunk in response.iter_content(chunk_size):
              if chunk:
                  f.write(chunk)
  
      # Print newline to clear the carriage return from the download progress
      statinfo = os.stat(filename)
      logger.info("Successfully downloaded %s, %s bytes." % (filename, statinfo.st_size))