firstOf

suspend fun <T> CoroutineScope.firstOf(variants: Iterable<Deferred<T>>, cancelOnResult: Boolean = true): T

suspend fun <T> CoroutineScope.firstOf(cancelOnResult: Boolean = true, block: DoWithFirstBuilder<T>.() -> Unit): T

suspend fun <T> CoroutineScope.firstOf(vararg variants: Deferred<T>, cancelOnResult: Boolean = true): T