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

    protected function initializeUploadAction()
    {
        $assetMappingConfiguration = $this->arguments->getArgument('asset')->getPropertyMappingConfiguration();
        $assetMappingConfiguration->allowProperties('title', 'resource');
        $assetMappingConfiguration->setTypeConverterOption(PersistentObjectConverter::class, PersistentObjectConverter::CONFIGURATION_CREATION_ALLOWED, true);
        $assetMappingConfiguration->setTypeConverterOption(AssetInterfaceConverter::class, AssetInterfaceConverter::CONFIGURATION_ONE_PER_RESOURCE, true);
    }