map suspend kotlin

Kotlin.kt

suspend fun hiThere(): Int {
    return withContext(Dispatchers.Default) {
        delay(1000)
        40
    }
}
@Test
fun test() {
    CoroutineScope(Job()).launch {
        flowOf(1)
            .map { hiThere() }
            .flowOn(Dispatchers.IO)
            .collect { println(it) }
    }
}