private function getClassicCollection(Request $request, $mediaFolder, $start, $count)
    {
        $params = $request->query->all();
        $contentType =  $request->get('contentType', null);

        if (null !== $contentType) {
            try {
                $params['contentType'] = AbstractClassContent::getClassnameByContentType($contentType);
            } catch (InvalidContentTypeException $e) {
                throw new NotFoundHttpException(sprintf('Provided content type (:%s) is invalid.', $params['contentType']));
            }
        }

        return $this->getMediaRepository()->getMedias($mediaFolder, $params, '_modified', 'desc', [
            'start' => $start,
            'limit' => $count,
        ]);
    }