observing xPath location

[voipworld]

Hey
i am using this to observe my ePubView xPath location:
private void observeEpub() {
binding.epubView.currentLocation()
.doOnNext(xPathLocation -> {
}).subscribe();}).subscribe();
i can save the xPath variable directly to shared pref, am i right?
is the "xPathLocation" in this case a variable or a object?
i am a bit confused on it...
thanks.