docs: public void clearAttributes ()
    {
      for (final Map.Entry <String, Object> entry : m_aAttributes.entrySet ())
      {
        final String sName = entry.getKey ();
        final Object aValue = entry.getValue ();
        if (aValue instanceof HttpSessionBindingListener)
          ((HttpSessionBindingListener) aValue).valueUnbound (new HttpSessionBindingEvent (this, sName, aValue));
      }
      m_aAttributes.clear ();
    }