Distinct Row Templates for NSPredicateEditor/NSRuleEditor rows

I'm trying to figure out if it's possible to use different row templates for specific rows in an NSPredicateEditor (or, if need be, an NSRuleEditor). I've got a screenshot that I think helps me explain this more clearly.

In this contrived exam开发者_开发知识库ple, I only want people to generate a filter that looks for a specific path above a certain size. So, in Section A (the Any block), users can only specify path rules (and the users can add additional paths). In section B, I only want the Size option to be available.

Nothing's jumping out at me from the docs (or, the stuff that does jump out at me ends up being something else), but it seems like this is the sort of thing that might come in handy, which makes me think it might be possible.

From what I understand about NSPredicateEditor, this is not possible. You might be able to swing it if you do everything yourself with an NSRuleEditor, but I haven't played with that class as much.

So in a nutshell: if you implement it yourself, it's possible. With the built-in stuff, I'm 99.9% certain that it's not a configurable behavior.