suspending kotlin coroutine

suspend.kt

suspend fun setValue(ref: DatabaseReference, value: Any) = suspendCoroutine<Boolean> { continuation ->
        ref.setValue(value)
                .addOnSuccessListener {
                    continuation.resume(true)
                }
                .addOnFailureListener {
                    continuation.resumeWithException(it)
                }
    }

// usage
GlobalScope.launch {
  val def = async{setValue(ref,val)}
  println(def.await());
}