public void scheduleAt(long expireAtMillis) {
            ScheduledQueue.this.scheduleAt(this, expireAtMillis);
        }
@author <a href="mailto:havardpe@yahoo-inc.com">Haavard Pettersen</a>
@author Simon Thoresen Hult
jdisc_core/src/main/java/com/yahoo/jdisc/core/ScheduledQueue.java