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

return new Promise(resolve => {
        AWSXRay.setDaemonAddress('127.0.0.1:2000');
        AWSXRay.enableAutomaticMode();

        const segment = new AWSXRay.Segment('aws-xray-lambda-promise-subsegment');
        const namespace = AWSXRay.getNamespace();

        namespace.run(async function () {
            AWSXRay.setSegment(segment);
console.log('segment', segment);
            try {
                await functionToHaveTraced(segment);
                segment.close();
            } catch (error) {
                console.error(error);
                segment.close(error);
            }
            resolve();
        });
    });
}

nameSpace.run(() => {
      nameSpace.set('segment', new AWSXRay.Segment('annotations'))
      const result = handler(event, context, callback)
      if (result != null) {
        Promise.resolve(result).then(
          resolved => {
            console.log('Result:')
            console.log(JSON.stringify(resolved))
          },
          rejected => {
            console.log('Error:')
            console.log(rejected)
          }
        )
      }
    })
  }