docs: def create_dampening(self, trigger_id, dampening):
          """
          Create a new dampening.
  
          :param trigger_id: TriggerId definition attached to the dampening
          :param dampening: Dampening definition to be created.
          :type dampening: Dampening
          :return: Created dampening
          """
          data = self._serialize_object(dampening)
          url = self._service_url(['triggers', trigger_id, 'dampenings'])
          return Dampening(self._post(url, data))