/** * Add the before selection handler to the tabbed panel. * * <p>Wrapper function for {@link * com.google.gwt.user.client.ui.TabLayoutPanel#addBeforeSelectionHandler(BeforeSelectionHandler)} * * @param handler the before selection handler * @return the registration for the event */ public HandlerRegistration addBeforeSelectionHandler(BeforeSelectionHandler<Integer> handler) { return m_tabPanel.addBeforeSelectionHandler(handler); }