docs: @Override
      public void deliveryDelayManagerStart() throws SevereMessageStoreException {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "deliveryDelayManagerStart");
          _deliveryDelayManager.start(_deliveryDelayScanInterval, _messagingEngine);
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "deliveryDelayManagerStart");
      }