[Flutter] Flutter blue plus connection state listener

I have an app that uses flutter_blue_plus and I want to add a listener to the connection state of the device. As soon as the device loose connection I want to show a popup anywhere inside my app to inform the user that they lost connection. I have multiple screens so where should I setup the listener so it can popup anywhere in my app? If I set up my listener in 'main.screen' will it be able to show popup all around the app?

I connect to my device on my 'main.screen'

This is the documentation from flutter_blue_plus:

// tip: using ??= makes it easy to only make new listener when currently null
final subscription ??= FlutterBluePlus.device.connectionState.listen((value) {
// ...
});

// also, make sure you cancel the subscription when done!
subscription.cancel()


How can I use this globally in my app?

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