How to use callkeep together with Universal Links? (Duplicate declaration of method 'application:continueUserActivity:restorationHandler:')

Bug report

• I've checked the example to reproduce the issue.

• Reproduced on:

• iOS

Description

I am using react-native-callkeep in a project together with Universal Links. The problem occurs already in the setup process of react-native-callkeep. According to the iOS Setup-Doc, it is necessary to add the following delegate to the AppDelegate.m which is called when the user tries to start a call from native Phone App:

- (BOOL)application:(UIApplication *)application continueUserActivity:(nonnull NSUserActivity *)userActivity restorationHandler:(nonnull void (^)(NSArray<id<UIUserActivityRestoring>> * _Nullable))restorationHandler { return [RNCallKeep application:application continueUserActivity:userActivity restorationHandler:restorationHandler]; }

However, due to the fact that I already have installed the Universal Linking I already had to add the following continueUserActivity delegate to the AppDelegate.m:

- (BOOL)application:(UIApplication *)application continueUserActivity:(nonnull NSUserActivity *)userActivity restorationHandler:(nonnull void (^)(NSArray<id<UIUserActivityRestoring>> * _Nullable))restorationHandler { return [RCTLinkingManager application:application continueUserActivity:userActivity restorationHandler:restorationHandler]; }

Both delegates can not be added, since Xcode is giving an error during compiling then.
Is there a possibility to use still both delegates on the same time?

Steps to Reproduce

Do not add the delegate which is mentioned in the iOS Setup-Doc to the AppDelegate.m and try to start a call from native Phone CallingApp.
No "didReceiveStartCallAction"-event will then be fired.

Versions

- Callkeep: 4.2.0
- React Native: 0.64.2
- iOS: 14.17.1
- Phone model: iPhone X (physical device)

Logs

Start with AppDelegate.m and the iOS setup documentation, comparing the two continueUserActivity:restorationHandler: delegates for RNCallKeep and RCTLinkingManager. Determine how Universal Links and incoming native calls can both be handled, then verify that the didReceiveStartCallAction event and Universal Link behavior work without duplicate declarations.