See: Description
| Interface | Description | 
|---|---|
| Activatable | 
 A class can be Activatable if it needs a significant amount of memory on an
 irregular basis, and so would benefit from being told when to wake-up and
 when to conserver memory. 
 | 
| Class | Description | 
|---|---|
| Activator | 
 Manager for instances of Activatable. 
 | 
| Lock | 
 This class only exists to dissuade you from calling activate() directly on an
 Activatable object. 
 | 
| Enum | Description | 
|---|---|
| Kill | 
 Enumeration of how memory is returned. 
 |