/// dumps content to lyxerr
virtual void dump() const;
/// write inset in .lyx format
virtual void write(Buffer const &, std::ostream &) const {}
/// read inset in .lyx format
virtual void read(Buffer const &, LyXLex &) {}
/// dumps content to lyxerr
virtual void dump() const;
/// write inset in .lyx format
virtual void write(Buffer const &, std::ostream &) const {}
/// read inset in .lyx format
virtual void read(Buffer const &, LyXLex &) {}