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kotlinlang

Hi, when working with multiple modules (libA, libB) where libB depends on libA, how can I implement an interface or abstract class defined in libA in libB? The libA class or interface is renamed with the module name as a prefix making the child class / implementor not of the same type.

`@ObjCName` doesn’t solve the problem. the libB doesn’t use the type from libA, it inherits from a completely different type

and if possible, i would like to use different modules, not a common umbrella with all the dependencies compiled in, so we can upgrade the different modules independently as long as we don’t make breaking changes

What problem are you facing exactly, can you share a code snippet &amp; error message or so, please?

```LibA and LibB
LibB depends on LibA
LibA Defines interface EventBusEvent (Protocol) 

public interface EventBus {
   public interface Event 
}

__attribute__((swift_name("EventBusEvent")))
@protocol MEBEventBusEvent
@required
@end


LibB
Imports LibA
Defines class Event 

sealed class Event : EventBus.Event {   
   data object Initialized : Event()
   data class SessionStarted(val sessionUrl: String): DXAEvent()
}

__attribute__((swift_name("Event_busEventBusEvent")))
@protocol MyEventsEvent_busEventBusEvent
@required
@end

__attribute__((swift_name("Event")))
@interface MyEventsEvent : MyEventsBase &lt;MyEventsEvent_busEventBusEvent&gt;
@end


The resulting obj-c has pulled all of LibA into LibB but with different names, using the module name as a prefix.

So when passing an Event to a service defined in LibA the types do not match.```

maybe its this: <https://youtrack.jetbrains.com/issue/KT-42250>

A workaround that comes to my mind might be to have the interface declared as protocol in objective-c (or swift, with the appropriate objective-c header generated from that), and import it both in libA and libB via cinterop - that shouldn't add any unwanted prefixes I think?

i’m not that familiar with the gradle configuration so I wouldn’t know where to start unfortunately to accomplish what your suggesting.  I went with an umbrella solution now cause I could figure that out.