Bug 317954 Version deltas file so that incompatible changes will be ignored
The deltas file needs to be versioned so that incompatible changes will be discarded allowing the workbench to be constructed as if there were no deltas in existence.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/XMLModelReconciler.java
for (Object command : commands) {
								if (command == reference) {
									return key;
								}
							}
							bindingsChanged = true;
							break;
						}
					}
				}
			}
			if (!bindingsChanged) {
				return reference.eContainer();
			}
		}
		if (reference instanceof MPartDescriptor) {
			EMap<EObject, EList<FeatureChange>> objectChanges = changeDescription
					.getObjectChanges();
			boolean descriptorsChanged = false;
			for (Entry<EObject, EList<FeatureChange>> entry : objectChanges.entrySet()) {
				EObject key = entry.getKey();
				if (key == rootObject) {
					for (FeatureChange change : entry.getValue()) {
						if (change.getFeatureName().equals(
								PARTDESCRIPTORCONTAINER_DESCRIPTORS_ATTNAME)) {
							List<?> descriptors = (List<?>) change.getValue();
							for (Object descriptor : descriptors) {
								if (descriptor == reference) {
									return key;
								}