code: func RenderList(w http.ResponseWriter, r *http.Request, l []Renderer) error {
  	for _, v := range l {
  		if err := renderer(w, r, v); err != nil {
  			return err
  		}
  	}
  	Respond(w, r, l)
  	return nil
  }
docs: // RenderList renders a slice of payloads and responds to the client request.