EventBus.kt

class EventBus {

   private val subscriptions = 
     mutableMapOf<KClass<out Any>, (Any) -> Unit>()

   inline fun <reified T : Event> subscribe(
       noinline callback: (T) -> Unit) {
       return subscribe(
               klass = T::class,
               callback = callback)
   }

   fun <T : Event> subscribe(klass: KClass<T>,
                             callback: (T) -> Unit) {
       subscriptions[klass] = callback as (Any) -> Unit
   }

}