public CompositeAlarm withStateTransitionedTimestamp(java.util.Date stateTransitionedTimestamp) {
        setStateTransitionedTimestamp(stateTransitionedTimestamp);
        return this;
    }
<p>
The timestamp of the last change to the alarm's <code>StateValue</code>.
</p>

@param stateTransitionedTimestamp
       The timestamp of the last change to the alarm's <code>StateValue</code>.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-cloudwatch/src/main/java/com/amazonaws/services/cloudwatch/model/CompositeAlarm.java