LeakAppModule.kt

...
@Module
class AppModule {
  ...
  // when using @Singleton or other Dagger scope or not using Provider
  // then link returned by get() will be cached by Dagger, то ссылка
  @Provides
  fun provideFeatureScanner(dependencies: ScannerFeatureDependencies): ScannerFeatureApi {
     ScannerFeatureComponentHolder.init(dependencies)
     return ScannerFeatureComponentHolder.get()
  }
  ...
}

LeakPurchaseComponentHolder.kt

...
object PurchaseComponentHolder : ComponentHolder<PurchaseFeatureApi, PurchaseFeatureDependencies> {
    private var purchaseComponentHolder: PurchaseComponent? = null
    ...
    override fun get(): PurchaseFeatureApi {
        checkNotNull(purchaseComponentHolder) { "PurchaseComponent was not initialized!" }
        return purchaseComponentHolder!!
    }

    override fun reset() {
        purchaseComponentHolder = null
    }
}