[kairos] Drop old Jobs in MutableEvents.emit

import kotlin.reflect.KProperty

import kotlinx.coroutines.CoroutineStart

import kotlinx.coroutines.Job

import kotlinx.coroutines.async

import kotlinx.coroutines.coroutineScope

import kotlinx.coroutines.launch

/**

 * A series of values of type [A] available at discrete points in time.

        coroutineScope {

            var jobOrNull: Job? = null

            val newEmit =

                async(start = CoroutineStart.LAZY) {

                launch(start = CoroutineStart.LAZY) {

                    jobOrNull?.join()

                    jobOrNull = null

                    network.transaction("MutableEvents.emit") { impl.visit(this, value) }.await()

                }

            jobOrNull = storage.getAndSet(newEmit)

            newEmit.await()

            newEmit.join()

            storage.compareAndExchange(newEmit, null)

        }

    }

}