async function turnOff(device, deviceFeature) {
  logger.debug(`Turning off the light of deviceFeature "${deviceFeature.selector}"`);
  await this.deviceManager.setValue(device, deviceFeature, STATE.OFF);
  this.eventManager.emit(EVENTS.LIGHT.TURNED_OFF, { device, deviceFeature });
}
@description TurnOff a given deviceFeature.
@param {object} device - The device to turnOff.
@param {object} deviceFeature - The deviceFeature to turnOff.
@example
light.turnOff(device, deviceFeature);