code: func URLMustParse(s string) *url.URL {
  	u, err := url.Parse(s)
  	if err != nil {
  		log.Errorf("Expected URL to parse: %q, got error: %v", s, err)
  	}
  	return u
  }
docs: // URLMustParse returns url.URL from static string. Don't use it with a dynamic param