public void setAdditionalMessage(String additionalMessage) {
        this.additionalMessage = additionalMessage;
    }
<p>
The message that you want to send. The message can be up to 200 characters.
</p>

@param additionalMessage
       The message that you want to send. The message can be up to 200 characters.
aws-java-sdk-iotevents/src/main/java/com/amazonaws/services/iotevents/model/EmailContent.java