code: @Override
      public java.util.concurrent.Future<DescribeStreamResult> describeStreamAsync(String streamName, Integer limit, String exclusiveStartShardId,
              com.amazonaws.handlers.AsyncHandler<DescribeStreamRequest, DescribeStreamResult> asyncHandler) {
  
          return describeStreamAsync(new DescribeStreamRequest().withStreamName(streamName).withLimit(limit).withExclusiveStartShardId(exclusiveStartShardId),
                  asyncHandler);
      }
docs: Simplified method form for invoking the DescribeStream operation with an AsyncHandler.
  
  @see #describeStreamAsync(DescribeStreamRequest, com.amazonaws.handlers.AsyncHandler)