AWS CDK：将Redshift群集放入现有子网组

Question

环境：CDK 1.49.1，打字稿，Mac OS X

我的AWS账户预装了Redshift子网组，我们假设它称为accountsetup-dirk-redshift-subnet-group

在使用“群集”构造时，我尝试传递子网组：

    new redshift.Cluster(this, 
      `Cluster${this.stackName}`,
      {
        vpc: vpc,
...
        vpcSubnets: {subnetName: 'accountsetup-dirk-redshift-subnet-group'},

正在运行的cdk合成器返回：

There are no subnet groups with name 'accountsetup-dirk-redshift-subnet-group' in this VPC. Available names: Private

如何将新群集放入现有子网组？