code: @Override
    public void writeMmap(long mmapAddress,
                          long []mmapBlocks,
                          long mmapOffset,
                          long mmapLength)
      throws IOException
    {
      _socket.writeMmap(mmapAddress, mmapBlocks, mmapOffset, mmapLength);
    }
docs: /*
  @Override
  public void writeMmap(long mmapAddress, long mmapOffset, int mmapLength)
  throws IOException
  {
  _socket.writeMmap(mmapAddress, mmapOffset, mmapLength);
  }