| Annotation Type | Description | 
|---|---|
| FBCBottom | The bottom type in the Freedom Before Commitment type system. | 
| Initialized | This type qualifier belongs to the freedom-before-commitment initialization tracking type-system. | 
| NotOnlyInitialized | A declaration annotation for fields that indicates that a client might observe the field storing
 values that are  Initialized,UnderInitialization, orUnknownInitialization, regardless of the
 initialization type annotation on the field's type. | 
| UnderInitialization | This type qualifier indicates that an object is (definitely) in the process of being
 constructed/initialized. | 
| UnknownInitialization | This type qualifier indicates how much of an object has been fully initialized. |