public ActionResult GetAllRooms()
 {
     List<RoomDTO> roomDTOs = new List<RoomDTO>();
     try
     {
         _roomService.ViewRooms().ForEach(room => roomDTOs.Add(RoomMapper.BackendRoomToGraphicalEditorRoom(room)));
         return Ok(roomDTOs);
     }
     catch (NotFoundException exception)
     {
         return NotFound(exception.Message);
     }
 }