When a notification from FCM has triggered the application to open from a quit state, this method will return a RemoteMessage containing the notification data, or null if the app was opened via another method.
RemoteMessage
null
Messaging instance.
Promise that resolves with the initial notification or null.
When a notification from FCM has triggered the application to open from a quit state, this method will return a
RemoteMessagecontaining the notification data, ornullif the app was opened via another method.