async function command(message, classification, context) {
  let nbAffectedLights = 0;
  const roomEntity = classification.entities.find((entity) => entity.entity === 'room');
  try {
    if (!roomEntity) {
      throw new NotFoundError('Room not found');
    }
    const devices = await this.getLightsInRoom(roomEntity.option);
    switch (classification.intent) {
      case 'light.turn-on':
        // foreach devices in room
        await Promise.map(devices, async (device) => {
          // Get the binary feature
          const deviceFeature = getDeviceFeature(
            device,
            DEVICE_FEATURE_CATEGORIES.LIGHT,
            DEVICE_FEATURE_TYPES.LIGHT.BINARY,
          );
          // and if the binary feature exists, call it
          if (deviceFeature) {
            await this.turnOn(device, deviceFeature);
            nbAffectedLights += 1;
          }
        });
        if (nbAffectedLights > 0) {
          this.messageManager.replyByIntent(message, 'light.turn-on.success', context);
        }
        break;
      case 'light.turn-off':
        // foreach devices in room
        await Promise.map(devices, async (device) => {
          // Get the binary feature
          const deviceFeature = getDeviceFeature(
            device,
            DEVICE_FEATURE_CATEGORIES.LIGHT,
            DEVICE_FEATURE_TYPES.LIGHT.BINARY,
          );
          // and if the binary feature exists, call it
          if (deviceFeature) {
            await this.turnOff(device, deviceFeature);
            nbAffectedLights += 1;
          }
        });
        if (nbAffectedLights > 0) {
          this.messageManager.replyByIntent(message, 'light.turn-off.success', context);
        }
        break;
      default:
        throw new Error('Not found');
    }
    if (nbAffectedLights === 0) {
      this.messageManager.replyByIntent(message, 'light.not-found', context);
    }
  } catch (e) {
    logger.debug(e);
    this.messageManager.replyByIntent(message, `${classification.intent}.fail`, context);
  }
  return null;
}
@description Command a light.
@param {object} message - The message sent by the user.
@param {object} classification - The classification calculated by the brain.
@param {object} context - The context object containing found variables in question.
@returns {Promise} Resolve when the command was executed.
@example
light.command(message, classification, context);