code: def getDevice(self, **kwargs): 
          
          filterchain = self.get(**kwargs)
          
          if not filterchain:
              return None
          
          # get filterchain init parameters that are compatible with RTSPCameraDevice input parameters
          pars = filterchain.getParDic(DataModel.RTSPCameraDevice.parameter_defs) 
          # .. and instantiate an RTSPCameraDevice with those parameters
          device = DataModel.RTSPCameraDevice(**pars)
          
          print(self.pre, "getDevice :", pars, device)
          
          return device
docs: Like get, but returns a Device instance (RTSPCameraDevice, etc.)