| Interface | Description | 
|---|---|
| Expiry<K,V> | 
 A policy object that governs expiration for mappings in a  
Cache. | 
| Class | Description | 
|---|---|
| Duration | 
 A time duration in a given  
TimeUnit. | 
| Expirations | 
 Utility class for getting predefined  
Expiry instances. | 
| Expirations.ExpiryBuilder<K,V> | 
 Builder to create a simple  
Expiry. |