private function generateLazyPropertiesDefaults(ClassMetadata $class)
    {
        $lazyPublicProperties = $this->getLazyLoadedPublicProperties($class);
        $values               = [];

        foreach ($lazyPublicProperties as $key => $value) {
            $values[] = var_export($key, true) . ' => ' . var_export($value, true);
        }

        return implode(', ', $values);
    }