operator==( const nsReadingIterator<CharT>& lhs, const nsReadingIterator<CharT>& rhs )
operator==( const nsWritingIterator<CharT>& lhs, const nsWritingIterator<CharT>& rhs )
operator==( const nsReadingIterator<CharT>& lhs, const nsReadingIterator<CharT>& rhs )  {    return lhs.get() == rhs.get();  }