gistfile1.txt

abstract class UseCase<out Type, in Params> where Type : Any {

    abstract suspend fun executeOperation(params: Params): Either<Failure, Type>

    suspend operator fun invoke(scope: CoroutineScope, params: Params, onResult: (Either<Failure, Type>) -> Unit = {}) = scope.launch {
        val job = executeOperation(params)
        withContext(Dispatchers.Main) {
            onResult(job)
        }
    }

    class None
}