Bug 271501 [CSS] CSSSWTApplyStylesListener - does it need to shell.pack()
bundles/org.eclipse.e4.ui.css.swt/src/org/eclipse/e4/ui/css/swt/engine/CSSSWTApplyStylesListener.java
public void handleEvent(Event event) {
			
			Widget widget = event.widget;
			if (!isWidgetAlreadyAdded(widget)) {
				widget.setData(WIDGET_ALREADY_ADDED, WIDGET_ALREADY_ADDED);
				if (engine != null) {
					engine.applyStyles(widget, false);
				}
			}
		}
	}
	private class ShowListener implements Listener {
		public void handleEvent(Event event) {
			Widget widget = event.widget;
		}
	}
}