What does the Xcode 5 Unused Feature setting actually do?

Question

Xcode 5 has a build option called "Unused Features". I read elsewhere that "the compiler can never say whether the Objective-C method is really not used, because it can be called dynamically, either through performSelector :, by subclassification, or in many other ways." Given that unused parameters do show parameters that are not used, I was surprised that unused functions did not have the expected behavior.

Can someone explain what is the meaning / influence of this parameter?

Answer 1

It applies to functions, not methods.