code: def set_shutter_level(self, level=0.0):
          
          data = {"channelIndex": 1, "deviceId": self.id, "shutterLevel": level}
          return self._restCall("device/control/setShutterLevel", body=json.dumps(data))
docs: sets the shutter level
  
          Args:
              level(float): the new level of the shutter. 0.0 = open, 1.0 = closed
          Returns:
              the result of the _restCall