/*
  public int hashCode()  {    int h = m_hash;    if (h == 0)    {      int off = m_start;      int len = m_length;      FastStringBuffer fsb = fsb();      for (int i = 0; i < len; i++)      {        h = 31 * h + fsb.charAt(off);        off++;      }      m_hash = h;    }    return h;  }