docs: def set_ac_fan_speed(self, speed):
          """
          :param speed: a float from 0.0 to 1.0 (0 - 100%)
          :return: nothing
          """
          desired_state = {"fan_speed": speed}
  
          response = self.api_interface.set_device_state(self, {
              "desired_state": desired_state
          })
  
          self._update_state_from_response(response)