code: public OutSegment openWriter()
    {
      if (isGcRequired()) {
        // _gcSequence = _seqGen.get();
        _table.getGcService().gc(_seqGen.get());
        _seqSinceGcCount = 0;
      }
      
      _seqSinceGcCount++;
      long sequence = _seqGen.get();
      
      return openWriterSeq(sequence);
    }
docs: Opens a new segment writer. The segment's sequence id will be the next
  sequence number.
  
  @return the new segment writer