问无法访问“筛选器”：它是“kotlinx.coroutines.channels”中的内部

EN

import kotlinx.coroutines.channels.BroadcastChannel
import kotlinx.coroutines.channels.ReceiveChannel
import kotlinx.coroutines.channels.filter
import kotlinx.coroutines.channels.map

object EventBus {
    @ObsoleteCoroutinesApi
    val bus: BroadcastChannel<Any> = BroadcastChannel(1)

    @ObsoleteCoroutinesApi
    fun send(o: Any) {
        CoroutineScope(Dispatchers.IO).launch {
            bus.send(o)
        }
    }

    @ObsoleteCoroutinesApi
    inline fun <reified T> asChannel(): ReceiveChannel<T> {
        return bus.openSubscription().filter { it is T }.map { it as T }
    }
}````


Can we replace the above usage of Map and Filter? Any help would be greatly appreciated.