Class method equivalent of -respondsToSelector:

Is there a class method equivalent to -respondsToSelector:?

Something like +respondsToSelector:?

The reason I am asking is because by implementing -respondsToSelector: on a class level, I get a compiler warning: "found '-respondsToSelector:' instead of '+respondsToSelector:' in protocol(s)".

The code looks like this:

Class <SomeProtocol> someClass = [someInstance class];

if ([someClass respondsToSelector:@selector(someSelector:)]) {
    someVar = [someClass someSelector:someData];
}