Bonus: Extension property to convert `Map<K, Li...

# announcements

[hastebrot]

Bonus: Extension property to convert Map<K, List<V>> to Iterable<Pair<K, V>>.

private val <K, V> Map<K, List<V>>.pairs: Iterable<Pair<K, V>>
    get() = flatMap { entry -> entry.value.map { value -> entry.key to value } }

So, enough for today.