f()
        finish()
    }
}

public fun <A : Any> List<A>.mergeWith(f: SublistMerger<A>.() -> Unit): List<A> =
    mutableListOf<A>().also { destination -> mergeInto(destination, f) }

public inline fun <A : Any, reified R : A> List<A>.mergeOnly(crossinline create: (List<R>) -> A?): List<A> =