How to use the @aws-cdk/aws-sns-subscriptions.SqsSubscription function in @aws-cdk/aws-sns-subscriptions

timeToLiveAttribute: "expires_at",
    });

    // ----------------------------------------------------------------
    // Messaging Channels
    this.alertTopic = new sns.Topic(this, "alertTopic");
    this.taskTopic = new sns.Topic(this, "taskTopic");
    this.contentTopic = new sns.Topic(this, "contentTopic");
    this.attributeTopic = new sns.Topic(this, "attributeTopic");
    this.reportTopic = new sns.Topic(this, "reportTopic");

    const alertQueueTimeout = cdk.Duration.seconds(30);
    this.alertQueue = new sqs.Queue(this, "alertQueue", {
      visibilityTimeout: alertQueueTimeout,
    });
    this.alertTopic.addSubscription(new SqsSubscription(this.alertQueue));

    const contentQueueTimeout = cdk.Duration.seconds(30);
    this.contentQueue = new sqs.Queue(this, "contentQueue", {
      visibilityTimeout: contentQueueTimeout,
    });

    const attributeQueueTimeout = cdk.Duration.seconds(30);
    this.attributeQueue = new sqs.Queue(this, "attributeQueue", {
      visibilityTimeout: attributeQueueTimeout,
    });

    // ----------------------------------------------------------------
    // Lambda Functions
    const baseEnvVars = {
      TASK_TOPIC: this.taskTopic.topicArn,
      REPORT_TOPIC: this.reportTopic.topicArn,