async function getDeviceFeaturesAggregated(req, res) {
    const states = await gladys.device.getDeviceFeaturesAggregatesMulti(
      req.query.device_features.split(','),
      req.query.interval,
      req.query.max_states,
      req.query.group_by,
    );
    res.json(states);
  }
@api {get} /api/v1/device_feature/aggregated_states getDeviceFeaturesAggregated
@apiName getDeviceFeaturesAggregated
@apiGroup Device