for medium article

multi_module_injector.kt

// your core injectores need to have public all public fields

------- Domain Injection -------
// in searchmovie Domain module build.gradle
dependencies {
    implementation project(":core")
}

class SearchMovieApiManager(private val retrofit : Retrofit) {
    val movieSearchService : MovieSearchService by lazy {
        retrofit.create(MovieSearchService::class.java)
    }
}

object SearchMovieResolver {
    fun provideSearchMoviewApiManager(retrofit: Retrofit) 
          = SearchMovieApiManager(retrofit)
}

// create injector side domain layer
object SearchDomainInjector {

    // step 3, api manager requires retrofit instance 
    private val apiManager = SearchMovieResolver
          .provideSearchMoviewApiManager(Injector.retrofit)

    // step 2, movie source requires apimanager 
    private val movieSearchSource by lazy {
       AppResolver.provideMovieDataSource(apiManager)
    }
  
    // step 1, factory requires movie search repository
    val movieSearchRepository by lazy {
       AppResolver.provideMovieRepository(movieSearchSource)
    }
    
}


------- UI Injection -------
// in searchmovie module build.gradle
dependencies {
    implementation project(":searchDomain")
}

object SearchMovieUiResolver {
    fun provideSearchMovieVmFactory(movieRepository : MovieSearchRepository) 
        = MovieSearchViewModelFactory(movieRepository)
}

// in your seach module you need to create scoped injection discussed above
object SearchInjector {
    fun searchViewModel(activity: AppCompatActivity) : MovieDetailViewModel {
      return ViewModelResolver.provideSearchViewModel(
                SearchMovieUiResolver.searchViewModelFactory, activity
            )
    }
}