public void setNotificationMetadata(String notificationMetadata) {
        this.notificationMetadata = notificationMetadata;
    }
<p>
Additional information that you want to include any time Amazon EC2 Auto Scaling sends a message to the
notification target.
</p>

@param notificationMetadata
       Additional information that you want to include any time Amazon EC2 Auto Scaling sends a message to the
       notification target.
aws-java-sdk-autoscaling/src/main/java/com/amazonaws/services/autoscaling/model/LifecycleHookSpecification.java