WEContentExtension/WEContentExtension-Swift.h Not found

[NStreet8579]

I'm integrating the SDK for Flutter app, For NotificationContent Service when i'm trying to import WEContentExtension/WEContentExtension-Swift.h, Compiler is not able to find this.

I have added the package https://github.com/WebEngage/WEContentExtension to NotificationContent.

#import <WEContentExtension/WEContentExtension-Swift.h> Not found.