| Class Summary | 
| AdaptiveController | This controller creates a simple yet very effective negative feedback
 that stabilizes the level of the container. | 
| Container | This class implements the simplest recycle bin wrapping around
 a Stack implementation. | 
| ControlledContainer | This class wraps around a RecycleBin to control it with a given
 controller. | 
| ControllerFactory | This class provides static methods to create Controllers given
 their class names. | 
| DefaultController | The default controller doesn't do anything. | 
| GaussianController | This is an adaptive controller based on a statistical analysis of
 the level transitions. | 
| LimitedContainer | This class wraps around a container to limit its capacity. | 
| MinMaxController | This level controller is based on a simpler variance method: the 
 variance of the request frequency is obtained from the difference
 between the minimum and maximum value of the level. |