code: @Override
      public java.util.concurrent.Future<DescribeEventSubscriptionsResult> describeEventSubscriptionsAsync(
              com.amazonaws.handlers.AsyncHandler<DescribeEventSubscriptionsRequest, DescribeEventSubscriptionsResult> asyncHandler) {
  
          return describeEventSubscriptionsAsync(new DescribeEventSubscriptionsRequest(), asyncHandler);
      }
docs: Simplified method form for invoking the DescribeEventSubscriptions operation with an AsyncHandler.
  
  @see #describeEventSubscriptionsAsync(DescribeEventSubscriptionsRequest, com.amazonaws.handlers.AsyncHandler)