I'm reading through the guides and, since this is my second "first approach" to Android development, I'm not sure I'm getting what is the purpose of the codes shown in those guide pages. It seems to me that they implement what is necessary for the device to receive the push notification, given that all the back-end configuration is correct. Is this the case?
If so, then they are both doing the same thing, ergo I could pick just one approach, correct?
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