Bug 303831 Warnings logged when trying to merge changes to an MPart's 'closeable' attribute
Warnings are printed out to syserr. --- WARNING: Unknown feature found, reconciliation may fail: Part#closeable
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/internal/XMLModelReconciler.java
String id = element.getAttribute(APPLICATIONELEMENT_ID_ATTNAME);
		if (!id.equals("")) { 
			return findReference(references, id);
		}
		return createObject(deltas, element, references);
	}
	private Object createObject(Collection<ModelDelta> deltas, String typeName, Element element,
			List<Object> references) {
		EObject object = createObject(typeName);
		CompositeDelta compositeDelta = new CompositeDelta(object);
		E4XMIResource resource = (E4XMIResource) rootObject.eResource();
		resource.setInternalId(object, element.getAttribute(XMIID_ATTNAME));
		NodeList elementAttributes = (NodeList) element;
		for (int i = 0; i < elementAttributes.getLength(); i++) {
			Node node = elementAttributes.item(i);
			if (node instanceof Element) {
				Element item = (Element) node;
				if (!isUnset(item)) {
					String attributeName = item.getNodeName();
					EStructuralFeature attributeFeature = getStructuralFeature(object,
							attributeName);
					if (attributeFeature != null) {
						if (isDirectReference(attributeName)) {
							String id = item.getAttribute(attributeName);
							Object objectReference = findReference(references, id);
							if (objectReference == null) {
								objectReference = createObject(deltas,
										getFirstElement((NodeList) item), references);
							}
							IDelta delta = new EMFModelDeltaSet(object, attributeFeature,