Neos\Media\Browser\Controller\AssetController::addAssetToCollectionAction PHP Метод

    public function addAssetToCollectionAction(Asset $asset, AssetCollection $assetCollection)
    {
        $success = false;
        if ($assetCollection->addAsset($asset)) {
            $this->assetCollectionRepository->update($assetCollection);
            $success = true;
        }
        $this->view->assign('value', $success);
    }