Bug 304586 Injected methods only react to changes to method arguments
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/internal/PartServiceImpl.java
String id = lastContainer.getId();
				if (id == null || id.length() == 0) {
					lastContainer.setId(category);
				}
			}
		}
		return providedPart;
	}
	private MElementContainer<?> getLastContainer() {
		MElementContainer<MUIElement> searchRoot = rootContainer;
		if (getActivePerspective() != null) {
			searchRoot = getActivePerspective();
			rootContainer = searchRoot;
		}
		List<MUIElement> children = searchRoot.getChildren();
		if (children.size() == 0) {
			MPartStack stack = MApplicationFactory.eINSTANCE.createPartStack();
			searchRoot.getChildren().add(stack);
			return stack;
		}
		MElementContainer<?> lastContainer = getLastContainer(rootContainer, children);
		if (lastContainer == null) {
			MPartStack stack = MApplicationFactory.eINSTANCE.createPartStack();
			searchRoot.getChildren().add(stack);
			return stack;
		}
		return lastContainer;
	}
	private MElementContainer<?> getLastContainer(MElementContainer<?> container, List<?> children) {
		if (children.isEmpty()) {