How can an Objective-C Class be tested to determine if it responds to a static selector (a class method)?

This is most easily explained with a brief example. Let's say I have the following protocol and class definitions: ``` @protocol ProtocolA <NSObject> @optional + (BOOL)methodA; @end @interface ClassA : NSObject <ProtocolA> @end ``` `ClassA` may or may not define `methodA`. If I was working with an instance of `ClassA` and an instance method, I could test the instance with `respondsToSelector:`. In this situation, however, I cannot think of any clean way to determine if `ClassA` defines (responds to) `methodA`. EDIT: I was silly and did not make my example specific enough, which meant the answer to the question was not exactly the solution to my problem -- so I am including a bit more code and the warning I am getting: ``` Class <ProtocolA> classRef = [ClassA class]; if([classRef respondsToSelector:@selector(methodA)]) {} ``` The above code throws the following warning: " Instance method '`respondsToSelector:`' found instead of class method '`respondsToSelector:`'" I only just now noticed that if I explicitly cast `classRef` to `(Class)` then the warning goes away. I still find that odd.