docs: public static String generate(String encrypt, String signature, String timestamp, String nonce) {
  
  		String format = "<xml>\n" + "<Encrypt><![CDATA[%1$s]]></Encrypt>\n"
  				+ "<MsgSignature><![CDATA[%2$s]]></MsgSignature>\n"
  				+ "<TimeStamp>%3$s</TimeStamp>\n" + "<Nonce><![CDATA[%4$s]]></Nonce>\n" + "</xml>";
  		return String.format(format, encrypt, signature, timestamp, nonce);
  
  	}