src/main/java/org/intellimate/izou/sdk/frameworks/presence/provider/template/PresenceNonConstant.java
@Override
    public void eventFired(EventModel event) {
        if (event.containsDescriptor(LeavingEvent.ID) || event.containsDescriptor(PresenceEvent.ID)) {
            if (event.containsDescriptor(LeavingEvent.ID)) {
                if (event.containsDescriptor(LeavingEvent.GENERAL_DESCRIPTOR)) {
                    present = false;
                    strictPresent = false;
                } else if (event.containsDescriptor(LeavingEvent.STRICT_DESCRIPTOR)) {
                    nonStrictAvailable().thenAccept(available -> {
                        if (!available)
                            present = false;
                        strictPresent = false;
                    });
                }
            } else {
                present = true;
                if (event.containsDescriptor(PresenceEvent.STRICT_DESCRIPTOR))
                    strictPresent = true;
            }
            if (event.containsDescriptor(PresenceEvent.STRICT_DESCRIPTOR))
                lastSeen = LocalDateTime.now();
        }
    }
@Override
    public void eventFired(EventModel event) {
        if (event.containsDescriptor(LeavingEvent.ID) || event.containsDescriptor(PresenceEvent.ID)) {
            if (event.containsDescriptor(LeavingEvent.ID)) {
                if (event.containsDescriptor(LeavingEvent.GENERAL_DESCRIPTOR)) {
                    present = false;
                    strictPresent = false;
                } else if (event.containsDescriptor(LeavingEvent.STRICT_DESCRIPTOR)) {
                    nonStrictAvailable().thenAccept(available -> {
                        if (!available)
                            present = false;
                        strictPresent = false;
                    });
                }
            } else {
                present = true;
                if (event.containsDescriptor(PresenceEvent.STRICT_DESCRIPTOR))
                    strictPresent = true;
            }
            if (event.containsDescriptor(PresenceEvent.STRICT_DESCRIPTOR))
                lastSeen = LocalDateTime.now();
        }
    }
Invoked when an activator-event occurs.

@param event an instance of Event