map
fun <O : ObjectWithUidInterface> mapByParentUid(objects: Collection<O>, parentExtractor: Transformer<O, String>): Map<String, List<O>>
Map a Collection with the a custom key extracted from the parentExtractor.
Return
A Map with a custom parent as key of the objects from the collection.
Parameters
objects
A collection of objects with uid.
parent
A Transformer that extracts the parent property of the object.