[Rule Request] Measure or Column not visible in any Perspective

[KornAlexander]

I added the following Rule to my BPA. I don't want my users to connect to the model directly and instead use one of the perspective. Therefore I need to make sure that all measures and columns are added to at least 1 perspective.

I use the following:
IsVisible and Model.Perspectives.Any() and not InPerspective.Any(it)