T - the type about to be selectedpublic interface BeforeSelectionHandler<T> extends EventHandler
BeforeSelectionEvent events.| Modifier and Type | Method and Description | 
|---|---|
| void | onBeforeSelection(BeforeSelectionEvent<T> event)Called when  BeforeSelectionEventis fired. | 
void onBeforeSelection(BeforeSelectionEvent<T> event)
BeforeSelectionEvent is fired.event - the BeforeSelectionEvent that was fired