API call using custom dispatcher for coroutines in K/N

ApiCall.kt

private class MainDispatcher: CoroutineDispatcher() {
    override fun dispatch(context: CoroutineContext, block: Runnable) {
        dispatch_async(dispatch_get_main_queue()) { block.run() } // This line gets highlighted when the error happens
    }
}

internal class MainScope: CoroutineScope {
    private val dispatcher = MainDispatcher()
    private val job = Job()

    override val coroutineContext: CoroutineContext
        get() = dispatcher + job
}

/*
*  This is the function that gets consumed on the Swift side
*/
@UnstableDefault
@ExperimentalStdlibApi
fun getNasaData(predicate: (Item) -> Unit) {
    MainScope().launch {
        NasaApi().info {
            predicate(it)
        }
    }
}