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 (constructDeltas(deltas, references, (EObject) child, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MBindingContainer) {
			for (MKeyBinding keyBinding : ((MBindingContainer) object).getBindings()) {
				if (constructDeltas(deltas, references, (EObject) keyBinding, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MHandlerContainer) {
			for (MHandler handler : ((MHandlerContainer) object).getHandlers()) {
				if (constructDeltas(deltas, references, (EObject) handler, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MApplication) {
			for (MCommand command : ((MApplication) object).getCommands()) {
				if (constructDeltas(deltas, references, (EObject) command, element, id)) {
					return true;
				}
			}
		}
		if (object instanceof MPartDescriptorContainer) {
			for (MPartDescriptor descriptor : ((MPartDescriptorContainer) object).getDescriptors()) {
				if (constructDeltas(deltas, references, (EObject) descriptor, element, id)) {
					return true;