docs: def url_to_resource(url, request=None):
      """
      Converts the given URL to a resource.
  
      :param request: Request object (required for the host name part of the
        URL). If this is not given, the current request is used.
      """
      if request is None:
          request = get_current_request()
  #    cnv = request.registry.getAdapter(request, IResourceUrlConverter)
      reg = get_current_registry()
      cnv = reg.getAdapter(request, IResourceUrlConverter)
      return cnv.url_to_resource(url)