docs: def set_fan_timer(self, timer):
          """
          :param timer: an int between fan_timer_range
          :return: nothing
          """
          desired_state = {"timer": timer}
  
          resp = self.api_interface.set_device_state(self, {
              "desired_state": desired_state
          })
  
          self._update_state_from_response(resp)