*/
private List<AbstractHistoryItem> createAddOperation(
MultiReferenceOperation op) {
List<AbstractHistoryItem> result = new ArrayList<AbstractHistoryItem>();
for (ModelElementId ref : op.getReferencedModelElements()) {
result.add(new AddHistoryItem(op.getModelElementId(), op
.getFeatureName(), ref, op.getIndex(), getUserName(), op.getClientDate()));
}
return result;
}