How can I find out the Objective-C generics type?

Question

Xcode 7 contains an Objective-C variant, where you can define a type-hint for (homogenous) NSArray return values and properties, defined such as NSArray&l

Answer 1

It is not possible to do that.

Generics were introduced in objective-c to improve the bridge between swift and objective-c. The advantage it gives to objective-c is only useful at compile time, and I that information is lost at runtime.