code: def render_link_tag(url, rel="stylesheet", media=None):
      
      url_dict = url_to_attrs_dict(url, url_attr="href")
      url_dict.setdefault("href", url_dict.pop("url", None))
      url_dict["rel"] = rel
      if media:
          url_dict["media"] = media
      return render_tag("link", attrs=url_dict, close=False)
docs: Build a link tag