code: public Boolean isEventNotificationPropertySet() {
  		if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
  			SibTr.entry(tc, "isEventNotificationPropertySet", this);
  
  		Boolean enabled = null; // enabled can be null/TRUE/FALSE, ie three-way
  
  		// Test whether custom properties contain a notification prop
  		if (customProperties
  				.containsKey(JsConstants.SIB_EVENT_NOTIFICATION_KEY)) {
  			String value = customProperties
  					.getProperty(JsConstants.SIB_EVENT_NOTIFICATION_KEY);
  
  			if (value != null) {
  				if (value
  						.equals(JsConstants.SIB_EVENT_NOTIFICATION_VALUE_ENABLED)) {
  					if (TraceComponent.isAnyTracingEnabled()
  							&& tc.isDebugEnabled())
  						SibTr.debug(tc,
  								"Event Notification is enabled at the Bus");
  					enabled = Boolean.TRUE;
  				} else if (value
  						.equals(JsConstants.SIB_EVENT_NOTIFICATION_VALUE_DISABLED)) {
  					if (TraceComponent.isAnyTracingEnabled()
  							&& tc.isDebugEnabled())
  						SibTr.debug(tc,
  								"Event Notification is disabled at the Bus");
  					enabled = Boolean.FALSE;
  				} else {
  					// Value MIS set, treat as NOT set
  					if (TraceComponent.isAnyTracingEnabled()
  							&& tc.isDebugEnabled())
  						SibTr.debug(tc,
  								"Event Notification Bus property set to: "
  										+ value);
  				}
  			}
  		}
  
  		if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
  			SibTr.exit(tc, "isEventNotificationPropertySet", enabled);
  		return enabled;
  	}
docs: Test whether Event Notification is enabled for the bus.