code: public StreamReadsRequest getStreamReadsRequest(StreamReadsRequest prototype) {
      return StreamReadsRequest.newBuilder(prototype)
          .setReferenceName(referenceName)
          .setStart(start)
          .setEnd(end)
          .build();
    }
docs: Construct a StreamReadsRequest for the Contig using a prototype request.
  
  @param prototype A partially filled in request object.
  @return the request object