public ActionResult <IEnumerable <MappedControllerInfo> > ListControllers()
 {
     return(mappedControllers.FindAll().Select(c => new MappedControllerInfo
     {
         Id = c.Device.Id,
         Name = c.Name,
         DeviceType = c.Device == null ? null : c.Device.DeviceType.ToString(),
         Emulator = c.Device == null ? null : c.Device.Emulator.ToString(),
         Active = c.Device != null,
     }).ToList());
 }