public function objectAttributes($builder)
    {
        $relationName = $this->getRelationName($builder);
        $relatedClass = $builder->getClassNameFromBuilder($builder->getNewStubObjectBuilder($this->getForeignTable()));
        $aggregateName = $this->getParameter('aggregate_name');

        return "/**
 * @var $relatedClass
 */
protected \$old{$relationName}{$aggregateName};
";
    }