| GuardedBy | The field or method that this annotation is attached to can only be accessed when holding a
 particular lock. | 
| Immutable | The class this method is attached to is immutable. | 
| NotThreadSafe | The class this annotation is attached to should be not be assumed to be thread-safe. | 
| ObtainsLockDirectly | The method that this annotation is attached to will directly synchronized on some lock
 during its course of execution. | 
| ObtainsLockIndirectly | The method that this annotation is attached to will indirectly synchronized on some
 lock (i.e. | 
| ThreadSafe | The class this annotation is attached may be assumed thread-safe. | 
| ToDelete | Marker interface for classes that are slated for deletion |