| Annotation Type | Description | 
|---|---|
| GuardedBy | The field or method to which this annotation is applied can only be accessed
 when holding a particular lock, which may be a built-in (synchronization)
 lock, or may be an explicit  Lock. | 
| Immutable | The class to which this annotation is applied is immutable. | 
| NotThreadSafe | The class to which this annotation is applied is not thread-safe. | 
| ThreadSafe | The class to which this annotation is applied is thread-safe. | 
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