Discrepancy in FCM REST API documentation for APNS parameters

[johsu]

Description

The documentation for the new live activity support through FCM displays live_activity_token in lower snake case:
https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages#ApnsConfig
https://firebase.google.com/docs/cloud-messaging/ios/live-activity#start-live-activity

However in practice, and as suggested by the FCM REST API Explorer, the apns body accepts liveActivityToken in camel case. The same goes for fcm_options vs fcmOptions.

Reproducing the issue

No response

Firebase SDK Version

N/A

Xcode Version

N/A

Installation Method

N/A

Firebase Product(s)

Messaging

Targeted Platforms

iOS

Relevant Log Output

No response

If using Swift Package Manager, the project's Package.resolved

No response

If using CocoaPods, the project's Podfile.lock

No response

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