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
objectReference);
							compositeDelta.add(delta);
						} else if (isIndirectReference(attributeName)) {
							String id = item.getAttribute(attributeName);
							Object objectReference = findReference(references, id);
							if (objectReference == null) {
								NodeList list = (NodeList) item;
								Element refElement = getFirstElement(list);
								if (refElement != null) {
									ModelDelta delta = createDelayedDelta(object, attributeFeature,
											refElement);
									deltas.add(delta);
								}
							} else {
								IDelta delta = new EMFModelDeltaSet(object, attributeFeature,
										objectReference);
								compositeDelta.add(delta);
							}
						} else if (isChainedReference(attributeName)) {
							List<Object> objectReferences = new ArrayList<Object>();
							NodeList objectReferenceNodes = (NodeList) item;
							for (int j = 0; j < objectReferenceNodes.getLength(); j++) {
								Node refNode = objectReferenceNodes.item(j);
								if (refNode instanceof Element) {
									Object objectReference = getReference(deltas,
											(Element) refNode, references);
									if (objectReference != null) {
										objectReferences.add(objectReference);
									}
								}