docs: public static WxCpXmlMessage fromEncryptedXml(
        String encryptedXml,
        WxCpConfigStorage wxCpConfigStorage,
        String timestamp, String nonce, String msgSignature) {
      WxCpCryptUtil cryptUtil = new WxCpCryptUtil(wxCpConfigStorage);
      String plainText = cryptUtil.decrypt(msgSignature, timestamp, nonce, encryptedXml);
      return fromXml(plainText);
    }