Bug 329950 'Close Others' and 'Close All' may cause bundle activation
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/StackRenderer.java
.getData(OWNING_ME);
				activateStack(stack);
			}
		});
	}
	private boolean closePart(Widget widget) {
		MUIElement uiElement = (MUIElement) widget
				.getData(AbstractPartRenderer.OWNING_ME);
		MPart part = (MPart) ((uiElement instanceof MPart) ? uiElement
				: ((MPlaceholder) uiElement).getRef());
		IEclipseContext partContext = part.getContext();
		IEclipseContext parentContext = getContextForParent(part);
		
		IEclipseContext context = partContext == null ? parentContext
				: partContext;
		
		EPartService partService = (EPartService) context
				.get(EPartService.class.getName());
		if (partService.savePart(part, true)) {
			partService.hidePart(part);
			return true;
		}
		
		
		return false;
	}
	protected void showTab(MUIElement element) {
		super.showTab(element);
		final CTabFolder ctf = (CTabFolder) getParentWidget(element);
		CTabItem cti = findItemForPart(element, null);