Xcode5 is saying Socket.IO uses private selectors

gistfile1.m

+ (id) objectFromJSONData:(NSData *)data error:(NSError **)error {
    Class serializer;
    
    // try SBJson first
    serializer = NSClassFromString(@"SBJsonParser");
    if (serializer) {
        id parser;
        id object;
        
        parser = [[serializer alloc] init];
        object = [parser objectWithData:data];
        
        return object;
    }
    
    // try Foundation's JSON coder, available in OS X 10.7/iOS 5.0
    serializer = NSClassFromString(@"NSJSONSerialization");
    if (serializer) {
        return [serializer JSONObjectWithData:data options:0 error:error];
    }
    
    // lastly, try JSONKit
    serializer = NSClassFromString(@"JSONDecoder");
    if (serializer) {
        return [[serializer decoder] objectWithData:data];
    }
    
    // unable to find a suitable JSON deseralizer
    [NSException raise:SocketIOException format:@"socket.IO-objc requires SBJson, JSONKit or an OS that has NSJSONSerialization."];
    
    return nil;
}