public TimerStartedEventAttributes withTimerId(String timerId) {
        setTimerId(timerId);
        return this;
    }
<p>
The unique ID of the timer that was started.
</p>

@param timerId
       The unique ID of the timer that was started.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-simpleworkflow/src/main/java/com/amazonaws/services/simpleworkflow/model/TimerStartedEventAttributes.java