T - the type about to be selectedpublic interface HasBeforeSelectionHandlers<T> extends HasHandlers
BeforeSelectionEvent events.| Modifier and Type | Method and Description | 
|---|---|
| HandlerRegistration | addBeforeSelectionHandler(BeforeSelectionHandler<T> handler)Adds a  BeforeSelectionEventhandler. | 
fireEventHandlerRegistration addBeforeSelectionHandler(BeforeSelectionHandler<T> handler)
BeforeSelectionEvent handler.handler - the handler