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
}
			}
		}
		if (object instanceof MPart) {
			MPart part = (MPart) object;
			for (MMenu menu : part.getMenus()) {
				if (constructDeltas(deltas, references, (EObject) menu, element, id)) {
					return true;
				}
			}
			MToolBar toolBar = part.getToolbar();
			if (toolBar != null) {
				if (constructDeltas(deltas, references, (EObject) toolBar, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MWindow) {
			MWindow window = (MWindow) object;
			if (constructDeltas(deltas, references, (EObject) window.getMainMenu(), element, id)) {
				return true;
			}
		}
		return false;
	}
	private void constructObjectDeltas(Collection<ModelDelta> deltas, List<Object> references,
			EObject object, Element element) {
		NodeList nodeList = (NodeList) element;
		for (int i = 0; i < nodeList.getLength(); i++) {
			Node node = nodeList.item(i);