System/Library/PrivateFrameworks/SpringBoardUIServices.framework

_SBSUICFUserNotificationContentExtensionContextHost.h

Download _SBSUICFUserNotificationContentExtensionContextHost.h

1. NSObject
2. >
3. NSExtensionContext

@interface _SBSUICFUserNotificationContentExtensionContextHost : NSExtensionContext

+ (id)_allowedItemPayloadClasses;

@end