code: def download_custom(self, data_url, custom_download):
      return self.download_and_extract(data_url)
  
imports: import os
  import re
  import urllib.parse
  from pathlib import Path
  from typing import Callable, List, Optional, Union
  from zipfile import ZipFile
  from ..utils.file_utils import cached_path, hf_github_url
  from ..utils.logging import get_logger
  from ..utils.version import Version
label_desc: Use image node_id 11 for calling the MockDownloadManager obj's underlying member method code with example usage: obj.download_custom(data_url, custom_download) and returns: self