public class DebugMenuConfiguration extends AbstractUiBindingConfiguration {
	
	private final Menu debugMenu;
	private final NatTable natTable;
	@Override
	public void configureUiBindings(UiBindingRegistry uiBindingRegistry) {
		uiBindingRegistry.registerMouseDownBinding(new MouseEventMatcher(SWT.NONE,																		 GridRegion.BODY,																	 MouseEventMatcher.RIGHT_BUTTON), new PopupMenuAction(this.debugMenu));

	}
	
	public DebugMenuConfiguration(NatTable natTable,MenuManager mgr) {
	    // extend the declarative menu provided by the MenuManager
		this.natTable = natTable;		
	    this.debugMenu = new PopupMenuBuilder(this.natTable,mgr)
	                .withInspectLabelsMenuItem()
	                .build();	   
	   
	}

}

 nattable.addConfiguration(new DebugMenuConfiguration(nattable,mgr)); // nattable is the instance of NatTable that I am working with

 public void createPartControl(Composite parent) {		
			
		MenuManager mgr = new MenuManager();			
		getSite().registerContextMenu("nattableContextMenu",mgr,null);