courses_group.dart

            /* item.subtitle != null */
            /*     ? Container( */
            /*         padding: const EdgeInsets.symmetric( */
            /*           vertical: 4, */
            /*           horizontal: 8, */
            /*         ), */
            /*         color: Colors.grey[100], */
            /*         child: Row( */
            /*           children: [ */
            /*             CircleAvatar( */
            /*               radius: 12, */
            /*               backgroundImage: CachedNetworkImageProvider( */
            /*                 item.subtitle!.imageUrl, */
            /*               ), */
            /*             ), */
            /*             const SizedBox(width: 6), */
            /*             Text( */
            /*               item.subtitle!.title, */
            /*               style: const TextStyle(fontWeight: FontWeight.w600), */
            /*             ), */
            /*           ], */
            /*         ), */
            /*       ) */
            /*     : const SizedBox(height: 0), */