protected:
void printrawindices(std::ostream & os) const;
void printtreeindices(std::ostream & os, unsigned indent) const;
void printindices(std::ostream & os) const;
protected:
void printrawindices(std::ostream & os) const;
void printtreeindices(std::ostream & os, unsigned indent) const;
void printindices(std::ostream & os) const;