Doctrine\ODM\MongoDB\UnitOfWork::doRefresh PHP Method

    private function doRefresh($document, array &$visited)
    {
        $oid = spl_object_hash($document);
        if (isset($visited[$oid])) {
            return;
            // Prevent infinite recursion
        }
        $visited[$oid] = $document;
        // mark visited
        $class = $this->dm->getClassMetadata(get_class($document));
        if (!$class->isEmbeddedDocument) {
            if ($this->getDocumentState($document) == self::STATE_MANAGED) {
                $id = $class->getDatabaseIdentifierValue($this->documentIdentifiers[$oid]);
                $this->getDocumentPersister($class->name)->refresh($id, $document);
            } else {
                throw new \InvalidArgumentException('Document is not MANAGED.');
            }
        }
        $this->cascadeRefresh($document, $visited);
    }