public function addDummyFile(array $config)
    {
        $keys = ['id', 'is_hidden', 'is_deleted', 'folder_id', 'name_original', 'name_new', 'name_new_compound', 'mime_type', 'extension', 'hash_name', 'hash_file', 'upload_timestamp', 'file_size', 'upload_user_id', 'caption'];
        $item = array_flip($keys);
        $data = array_merge($item, $config);
        $this->_files[$data['id']] = $data;
    }