public void setEventType(String eventType) {
        this.eventType = eventType;
    }
<p>
The event type. If the value is <code>STATE_CHANGE</code>, the event contains information about alarm state
changes.
</p>

@param eventType
       The event type. If the value is <code>STATE_CHANGE</code>, the event contains information about alarm
       state changes.
@see EventType
aws-java-sdk-ioteventsdata/src/main/java/com/amazonaws/services/ioteventsdata/model/SystemEvent.java