code: @Override
      public java.util.concurrent.Future<ConfirmSubscriptionResult> confirmSubscriptionAsync(String topicArn, String token, String authenticateOnUnsubscribe,
              com.amazonaws.handlers.AsyncHandler<ConfirmSubscriptionRequest, ConfirmSubscriptionResult> asyncHandler) {
  
          return confirmSubscriptionAsync(
                  new ConfirmSubscriptionRequest().withTopicArn(topicArn).withToken(token).withAuthenticateOnUnsubscribe(authenticateOnUnsubscribe), asyncHandler);
      }
docs: Simplified method form for invoking the ConfirmSubscription operation with an AsyncHandler.
  
  @see #confirmSubscriptionAsync(ConfirmSubscriptionRequest, com.amazonaws.handlers.AsyncHandler)