code: @Override
      public java.util.concurrent.Future<SplitShardResult> splitShardAsync(String streamName, String shardToSplit, String newStartingHashKey,
              com.amazonaws.handlers.AsyncHandler<SplitShardRequest, SplitShardResult> asyncHandler) {
  
          return splitShardAsync(new SplitShardRequest().withStreamName(streamName).withShardToSplit(shardToSplit).withNewStartingHashKey(newStartingHashKey),
                  asyncHandler);
      }
docs: Simplified method form for invoking the SplitShard operation with an AsyncHandler.
  
  @see #splitShardAsync(SplitShardRequest, com.amazonaws.handlers.AsyncHandler)