Hello! There is no method to set the protected attribute $firebaseAppInstanceId in react native, so the 3. of this tutorial for the revenueCat 
firebase analytics integration can’t be completed. Setting it with Purchases.setAttributes({$firebaseAppInstanceId: THE_ID }) doesn’t work.
How can I do it?
I was also looking into this integration. I’ve also tried this, but I can’t see any events being made in Google Analytics.
I did find a `Purchases.setFirebaseAppInstanceID` from inspecting the purchases source. Needs to be mentioned in the docs :)
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