Bug 316279 MCommand's 'parameters' feature is not being persisted correctly
SSIA
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/XMLModelReconciler.java
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,
									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);
							}