import kotlin.reflect.KClass

//private interface TypeAdapterFactory {
//    fun <T> create(): TypeAdapter<T>?
//}
private interface TypeAdapter<T>

private class Test<T : Any>(private val klass: KClass<T>) : TypeAdapterFactory {

    override fun <T : Any> create(): TypeAdapter<T>? {
                                                return Adapter<T>(klass)
    }

    class Adapter<T : Any>(
            private val klass: KClass<T>
    ) : TypeAdapter<T>
}