Guava ImmutableSortedSetMultimap?

Question

Google Guava has a SortedSetMultimap. Wonderful. Now where is the immutable version? There exists an ImmutableSetMultimap. But what about ImmutableSortedSetMultimap? (Please don't reply with "Why do you want one?")

Answer 1

It won't actually implement SortedSetMultimap, but ImmutableSetMultimap.Builder has an orderValuesBy(Comparator) method that you can use, which has the effect that the value collections are ImmutableSortedSets.