Bug 277676 [UI] The workbench should create the contexts
The workbench should create contexts for the model elements, MApplication and MParts (windows, sashes, contributed parts, etc). This is not really the responsibility of the renderers. PW
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/internal/Workbench.java
return app;
	}
	private void processPartContributions(Resource resource, MWindow mWindow) {
		IExtensionRegistry registry = RegistryFactory.getRegistry();
		String extId = "org.eclipse.e4.workbench.parts"; 
		IConfigurationElement[] parts = registry
				.getConfigurationElementsFor(extId);
		for (int i = 0; i < parts.length; i++) {
			MContributedPart<?> part = ApplicationFactory.eINSTANCE
					.createMContributedPart();
			part.setName(parts[i].getAttribute("label")); 
			part.setIconURI("platform:/plugin/" 
					+ parts[i].getContributor().getName() + "/" 
					+ parts[i].getAttribute("icon")); 
			part.setURI("platform:/plugin/" 
					+ parts[i].getContributor().getName() + "/" 
					+ parts[i].getAttribute("class")); 
			String parentId = parts[i].getAttribute("parentId"); 
			MPart parent = (MPart) findObject(resource.getAllContents(),
					parentId);
			if (parent != null) {
				parent.getChildren().add(part);
			}
		}
	}
	private EObject findObject(TreeIterator<EObject> it, String id) {
		while (it.hasNext()) {
			EObject el = it.next();
			if (el instanceof MApplicationElement) {
				if (el.eResource().getURIFragment(el).equals(id)) {