import org.eclipse.e4.ui.model.application.ui.menu.MToolBarElement;
import org.eclipse.e4.ui.services.EMenuService;
import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
-import org.eclipse.e4.ui.workbench.modeling.ISelectionListener;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.SWT;