launch.kt

public actual fun launch(
  context: CoroutineContext = DefaultDispatcher,
  start: CoroutineStart = CoroutineStart.DEFAULT,
  parent: Job? = null, 
  block: suspend CoroutineScope.() -> Unit
): Job {
  val newContext = newCoroutineContext(context, parent)
  val coroutine = if (start.isLazy)   
  LazyStandaloneCoroutine(newContext, block) else 
  StandaloneCoroutine(newContext, active = true)
  coroutine.start(start, coroutine, block)
  return coroutine
}