code: public SipApplicationSessionTimerTask schedule(
              SipApplicationSessionTimerTask expirationTimerTask, long delay,
              TimeUnit unit) {
          if(logger.isDebugEnabled()) {
              logger.debug("Scheduling sip application session "+ expirationTimerTask.getSipApplicationSession().getKey() +" to expire in " + (delay / (double) 1000 / (double) 60) + " minutes");
          }
          super.schedule(((StandardSasTimerTask)expirationTimerTask), delay);
          return expirationTimerTask;
      }
docs: /* (non-Javadoc)
  @see org.mobicents.servlet.sip.startup.SipApplicationSessionTimerService#schedule(org.mobicents.servlet.sip.core.timers.SipApplicationSessionTimerTask, long, java.util.concurrent.TimeUnit)