code: def download_and_cache_url(
      url: str,
      cache_duration: datetime.timedelta,
      *,
      download: Callable[[str], bytes] = download_url,
      comment: bytes = b"# ",
  ) -> bytes:
      """
      Downloads a file from the URL, stores it under ~/.cache/, and returns its content.
  
      For tracking the age of the content, a prefix is inserted into the stored file, rather than relying on mtime.
  
      Args:
          url: URL to use.
          download: Callback that will accept the URL and actually perform the download.
          cache_duration: How long to consider the URL content cached.
          comment: The appropriate comment prefix for this file format.
      """
      return mkdocs_get_deps.cache.download_and_cache_url(
          url=url,
          cache_duration=cache_duration,
          download=download,
          comment=comment,
      )
  
imports: import datetime
  import urllib.request
  from typing import Callable
  import mkdocs_get_deps.cache
  import mkdocs
label_desc: Use image node_id 2 for calling a global function with example usage: download_and_cache_url(url, cache_duration) and returns: mkdocs_get_deps