Jackalope\Version\VersionManager::checkout PHP Method

    public function checkout($absPath)
    {
        $this->objectManager->checkout($absPath);
        if ($node = $this->objectManager->getCachedNode($absPath)) {
            // OPTIMIZE: set property jcr:isCheckedOut on node directly? but without triggering write on save()
            $node->setDirty();
        }
    }