items.add(new ToolbarItem() {
private static final long serialVersionUID = 1L;
@Override
public Component getComponent(String toolbarItemId) {
return new LinkPanel(toolbarItemId, new ResourceModel(MKEY_OK)) {
private static final long serialVersionUID = 1L;
@Override
protected void onClick() {
Set<Serializable> usersIds = selectionColumn.getSelectedEntitiesIds();