How to use the @aws-cdk/aws-elasticloadbalancingv2.NetworkLoadBalancer function in @aws-cdk/aws-elasticloadbalancingv2

if (props.cluster && props.vpc) {
      throw new Error('You can only specify either vpc or cluster. Alternatively, you can leave both blank');
    }
    this.cluster = props.cluster || this.getDefaultCluster(this, props.vpc);

    this.desiredCount = props.desiredCount || 1;

    const internetFacing = props.publicLoadBalancer !== undefined ? props.publicLoadBalancer : true;

    const lbProps = {
      vpc: this.cluster.vpc,
      internetFacing
    };

    this.loadBalancer = props.loadBalancer !== undefined ? props.loadBalancer : new NetworkLoadBalancer(this, 'LB', lbProps);

    const targetProps = {
      port: 80
    };

    this.listener = this.loadBalancer.addListener('PublicListener', { port: 80 });
    this.targetGroup = this.listener.addTargets('ECS', targetProps);

    if (typeof props.domainName !== 'undefined') {
      if (typeof props.domainZone === 'undefined') {
        throw new Error('A Route53 hosted domain zone name is required to configure the specified domain name');
      }

      new ARecord(this, "DNS", {
        zone: props.domainZone,
        recordName: props.domainName,