Makes sense, especially since it seems like other parts of this file have conditionals based on `KWAny` anyway. It'd be great if you could use the same [method of comparison as those parts of the code](https://github.com/csky-ios/Kiwi/blob/a7f0ed187202d5c80ef951ac5ec6dbb06189ca0f/NonARC/KWMessagePattern.m#L140).