Ability to set exported variable as abstract

[CubeOfCheese]

If exported variables could be tagged as abstract, it could help prevent scenes from being misused.

Syntax:
@export abstract var myVar : Type

The effect would be that the property would not be allowed to be set via inspector within that scene. The inspector would only allow that property to be set from instances.

I don't know if abstract is the best word for this seeing as I can't think of any other language that has abstract properties like what I'm proposing.

Any thoughts?