ags, opts.attrs)
                .firstChild.innerHTML;
        }

        /**
   * Returns a formatted localized string where $1 to $9 are replaced by the
   * second to the tenth argument. Any standalone $ signs must be escaped as
   * $$.
   * @param {string} label The label to substitute through.
   *     This is not an resource ID.
   * @param {...(string|number)} var_args The extra values to include in the
   *     formatted output.
   * @return {string} The formatted string.
   */
        substituteS