Doctrine\ODM\CouchDB\UnitOfWork::doScheduleInsert PHP Method

    private function doScheduleInsert($document, &$visited)
    {
        $oid = \spl_object_hash($document);
        if (isset($visited[$oid])) {
            return;
        }
        $visited[$oid] = true;
        $class = $this->dm->getClassMetadata(get_class($document));
        $state = $this->getDocumentState($document);
        switch ($state) {
            case self::STATE_NEW:
                $this->persistNew($class, $document);
                break;
            case self::STATE_MANAGED:
                // TODO: Change Tracking Deferred Explicit
                break;
            case self::STATE_REMOVED:
                // document becomes managed again
                unset($this->scheduledRemovals[$oid]);
                $this->documentState[$oid] = self::STATE_MANAGED;
                break;
            case self::STATE_DETACHED:
                throw new \InvalidArgumentException("Detached document passed to persist().");
                break;
        }
        $this->cascadeScheduleInsert($class, $document, $visited);
    }