code: @Override
    public void fillKey(RowCursor cursor, Object []args)
    {
      _whereKraken.fillMinCursor(cursor, args);
    }
docs: /*
  @Override
  public void unwatch(DatabaseWatch watch, Object... args)
  {
  TableKelp tableKelp = _table.getTableKelp();
  
  RowCursor minCursor = tableKelp.cursor();
  RowCursor maxCursor = tableKelp.cursor();
  
  minCursor.clear();
  maxCursor.setKeyMax();
  
  _whereKraken.fillMinCursor(minCursor, args);
  _whereKraken.fillMaxCursor(minCursor, args);
  
  QueryKelp whereKelp = _whereExpr.bind(args);
  XXX: binding should be with unique
  EnvKelp whereKelp = new EnvKelp(_whereKelp, args);
  
  tableKelp.findOne(minCursor, maxCursor, whereKelp,
  new FindDeleteResult(result));
  
  _table.removeWatch(watch, minCursor.getKey());
  
  result.completed(null);
  }