code: public void setNotificationArns(java.util.Collection<String> notificationArns) {
          if (notificationArns == null) {
              this.notificationArns = null;
              return;
          }
  
          this.notificationArns = new java.util.ArrayList<String>(notificationArns);
      }
docs: <p>
  Passed to CloudFormation. The SNS topic ARNs to which to publish stack-related events.
  </p>
  
  @param notificationArns
  Passed to CloudFormation. The SNS topic ARNs to which to publish stack-related events.