| addObserver(PEIP_INF_Observer $observer) | PEIP_INF_Observable | |
| clearChanged() | PEIP_INF_Observable | |
| countObservers() | PEIP_INF_Observable | |
| deleteObserver(PEIP_INF_Observer $observer) | PEIP_INF_Observable | |
| hasChanged() | PEIP_INF_Observable | |
| notifyObservers(array $arguments=array()) | PEIP_INF_Observable | |
| setChanged() | PEIP_INF_Observable | 
 1.5.1