selfVM.JsonToObjects as described here Import xml and JSon with MDriven is available only in Viewodel and will import json from a string and fill in matching attributes and associations from the model starting from an object that JSonToObjects create based on sent in type (first argument).

JSonToObjects offers no transformation layer between your Json and your model - things need to share names in order to match.

The TaJSon strategy is different in that it always use a viewmodel as a template for both getting and setting data hierarchies to and from json strings. TaJson offers to update objects hieracies in a whole other way than JSonToObjects does as JSonToObjects always create new objects.