Since 1.5.0 the nullValueMappingStrategy can be separately defined for Iterables and Maps via nullValueIterableMappingStrategy and nullValueMapMappingStrategy respectively.

It would be nice to do the same for nullValuePropertyMappingStrategy by introducing nullValueIterablePropertyMappingStrategy and nullValueMapPropertyMappingStrategy.

(by the way, I would have found nullValueCollectionMappingStrategy more appropriate than nullValueIterableMappingStrategy)

This would also facilitate the introduction of another NullValuePropertyMappingStrategy, but for that I'll start a new discussion: #3381.