See: Description
| Annotation Type | Description | 
|---|---|
| Beta | Signifies that a public API (public class, method or field) is subject to
 incompatible changes, or even removal, in a future release. | 
| 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. |