Recently read up on JCIP annotations and they seem cool. Went to the website and took a look at the source. The only problem is that the src jar just contains the annotations...I'm not seeing where I can find the annotation processors that actually *do* anything! Am I just looking in the wrong place, or are these not real Java annotations (meaning, is there no way to enforce `@Immutable` when it is used to mark a class)?

* `@Immutable`
* `@GuardedBy`