Right now i am using Google Cloud Messaging 2.0 by default its using myregistration_id in GCM version.Now i want move to FirbaseCloudMessaging or GoogleCloudMessaging 3.
is both are backward compatible?
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os 与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
