nextMessageOrNullAsync

inline fun <P : MessageEvent> P.nextMessageOrNullAsync(    timeoutMillis: Long,     coroutineContext: CoroutineContext = EmptyCoroutineContext,     priority: EventPriority = EventPriority.MONITOR,     noinline filter: suspend P.(P) -> Boolean = { true }): <ERROR CLASS><MessageChain?>

nextMessageOrNull 的异步版本

See also