This strawman comes up every time we have a discussion about the developer agreement. The section referencing "private" APIs is talking about Apple specific AP

This strawman comes up every time we have a discussion about the developer agreement. The section referencing "private" APIs is talking about Apple specific APIs which have not been publicly documented. In Apple nomenclature, Public="class, methods, and properties are documented in the reference library and exposed for developers to use." Private="undocumented and exposed for Apple internal purposes only". Basically, if you can find it mentioned in the documentation, you can freely use it. If you had to do a class dump or use introspection to even find the method out, it's probably private.