Don't crash when K9WorkerFactory gets called for an unknown class

        appContext: Context,

        workerClassName: String,

        workerParameters: WorkerParameters

    ): ListenableWorker {

    ): ListenableWorker? {

        val workerClass = Class.forName(workerClassName).kotlin

        return getKoin().get(workerClass) { parametersOf(workerParameters) }

        return getKoin().getOrNull(workerClass) { parametersOf(workerParameters) }

    }

}