}
@Override
public Key getParentKey(Object data) {
if (!repository.containsKey(parentField.getType())) {
throw new NonStoredParentException(parentField);
}
DatastoreFinderService parentService = (DatastoreFinderService) repository
.get(parentField.getType());
IdManager parentIdManager = parentService.getIdManager();
Object parentObject = parentField.get(data);