src/CoreBundle/EventListener/DcGeneral/Table/RenderSettings/AddAssetListener.php
public function getStylesheets(GetOptionsEvent $event)
    {
        if (!$this->wantToHandle($event)
            || ($event->getPropertyName() !== 'additionalCss')
            || ($event->getSubPropertyName() !== 'file')) {
            return;
        }

        $event->setOptions($this->scanFiles('css'));
    }
public function getStylesheets(GetOptionsEvent $event)
    {
        if (!$this->wantToHandle($event)
            || ($event->getPropertyName() !== 'additionalCss')
            || ($event->getSubPropertyName() !== 'file')) {
            return;
        }

        $event->setOptions($this->scanFiles('css'));
    }
Provide options for additional css files.

@param GetOptionsEvent $event The event.

@return void