As we all know in Revit you can make clash test for your elements Versus itself or Versus other links inside the model. But in some cases the criteria of the project division is to make a general\overall\ghost models which contains other smaller models.
You can make clash with the link itself if there are elements modeled inside it but you cannot make clash test with the nested links (whether overlay or attachment) that exist in the main link.
I believe this will be a good improvment to be added to Revit as for quick check you will not need to export NSC and check in the Navisworks.
