Builder like pattern to add values to MapMessage

        EventLogger.logEvent(
            new StructuredDataMessage(confirm, null, "transfer")
                .withValue("toAccount", toAccount)
                .withValue("fromAccount", fromAccount)
                .withValue("amount", amount)
        );

        StructuredDataMessage msg = new StructuredDataMessage(confirm, null, "transfer");
        msg.put("toAccount", toAccount);
        msg.put("fromAccount", fromAccount);
        msg.put("amount", amount);
        EventLogger.logEvent(msg);