How to use the @aws-cdk/aws-s3.CfnBucket function in @aws-cdk/aws-s3

constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    const resource = new DemoResource(this, 'DemoResource', {
      message: 'CustomResource says hello',
    });

    // Bucket with an invalid name will fail the deployment and cause a rollback
    const bucket = new CfnBucket(this, 'FailingBucket', {
      bucketName: 'hello!@#$^'
    });

    // Make sure the rollback gets triggered only after the custom resource has been fully created.
    bucket.node.addDependency(resource);
  }
}