docs: public static WxMpXmlMessage fromEncryptedXml(
        String encryptedXml,
        WxMpConfigStorage wxMpConfigStorage,
        String timestamp, String nonce, String msgSignature) {
      WxMpCryptUtil cryptUtil = new WxMpCryptUtil(wxMpConfigStorage);
      String plainText = cryptUtil.decrypt(msgSignature, timestamp, nonce, encryptedXml);
      return fromXml(plainText);
    }