code: @Override
    @SuppressWarnings("unchecked")
    public void sessionTimerCanceled(ServerRfSession appSession, ScheduledFuture timer) throws InternalException {
      logger.info("sessionTimerCanceled :: appSession[" + appSession + "]");
    }
docs: /*
  (non-Javadoc)
  
  @see
  org.jdiameter.common.api.app.Rf.IServerRfActionContext#srssionTimerCanceled
  (org.jdiameter.api.Rf.ServerRfSession,
  java.util.concurrent.ScheduledFuture)