How to use the aws-xray-sdk-core.isAutomaticMode function in aws-xray-sdk-core

function captureQuery() {
  var args = resolveArguments(arguments);
  var parent = AWSXRay.resolveSegment(args.segment);

  if (!parent) {
    AWSXRay.getLogger().info('Failed to capture Postgres. Cannot resolve sub/segment.');
    return this.__query.apply(this, arguments);
  }

  var subsegment = parent.addNewSubsegment(this.database + '@' + this.host);

  if (args.callback) {
    var cb = args.callback;

    if (AWSXRay.isAutomaticMode()) {
      args.callback = function autoContext(err, data) {
        var session = AWSXRay.getNamespace();

        session.run(function() {
          AWSXRay.setSegment(subsegment);
          cb(err, data);
        });

        subsegment.close(err);
      };
    } else {
      args.callback = function(err, data) {
        cb(err, data, subsegment);
        subsegment.close(err);
      };
    }

if (this.statusCode === 429)
          segment.addThrottleFlag();
        if (AWSXRay.utils.getCauseTypeFromHttpStatus(this.statusCode))
          segment[AWSXRay.utils.getCauseTypeFromHttpStatus(this.statusCode)] = true;

        segment.http.close(this);
        segment.close();

        AWSXRay.getLogger().debug('Closed express segment successfully: { url: ' + req.url + ', name: ' + segment.name + ', trace_id: ' +
          segment.trace_id + ', id: ' + segment.id + ', sampled: ' + !segment.notTraced + ' }');
      };

      res.on('finish', endSegment);
      res.on('close', endSegment);

      if (AWSXRay.isAutomaticMode()) {
        var ns = AWSXRay.getNamespace();
        ns.bindEmitter(req);
        ns.bindEmitter(res);

        ns.run(function () {
          AWSXRay.setSegment(segment);

          if (next) { next(); }
        });
      } else {
        req.segment = segment;
        if (next) { next(); }
      }
    };
  },