GraphAware\Neo4j\OGM\UnitOfWork::addManaged PHP Method

    public function addManaged($entity)
    {
        $oid = spl_object_hash($entity);
        $classMetadata = $this->entityManager->getClassMetadataFor(get_class($entity));
        $id = $classMetadata->getIdValue($entity);
        if (null === $id) {
            throw new \LogicException('Entity marked for managed but could not find identity');
        }
        $this->entityStates[$oid] = self::STATE_MANAGED;
        $this->entityIds[$oid] = $id;
        $this->entitiesById[$id] = $entity;
        $this->manageEntityReference($oid);
    }