Understanding this use of “(Private)” in @interface declaration

Question

I\'ve seen some code written this way:

@interface AViewController(Private)

I wanted to know if that (Private) means something when

Answer 1

(Private) in this case deals with principles of Object Oriented Programming.

This does not necessarily denote a Private API, which would violate the Apple iPhone Developer Agreement.

Note: App Store approval is very black-box, so I can not guarantee that such code would not indeed result in rejection during the approval process.