I agree. I was thinking the same thing while I was doing the docs. However I came to the conclusion a key like that wouldn't be enough. So I figured passing the current path in the array (e.g. `User.4.Comment.5`) to these functions. Then you could use `sscanf()` or simply regex to get from the path what you need and check against that. A single key just isn't going to cut it if you only want to target `User.created` for example.