code: def create_dummy_data_single(self, path_to_dummy_data, data_url):
      for download_callback in self.download_callbacks:
          download_callback(data_url)
      # we force the name of each key to be the last file / folder name of the url path
      # if the url has arguments, we need to encode them with urllib.parse.quote_plus
      value = os.path.join(
          path_to_dummy_data,
          urllib.parse.quote_plus(data_url.split("/")[-1]),
      )
      if os.path.exists(value) or not self.load_existing_dummy_data:
          return value
      else:
          # Backward compatibility, maybe deprecate at one point.
          # For many datasets with single url calls to dl_manager.download_and_extract,
          # the dummy_data.zip file is actually the zipped downloaded file
          # while now we expected the dummy_data.zip file to be a directory containing
          # the downloaded file.
          return path_to_dummy_data
  
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 16 for calling the MockDownloadManager obj's underlying member method code with example usage: obj.create_dummy_data_single(path_to_dummy_data, data_url) and returns: value, path_to_dummy_data