void put(std::string const & lyx, docstring const & text);
bool hasLyXContents() const;
bool hasGraphicsContents(GraphicsType type = AnyGraphicsType) const;
void put(std::string const & lyx, docstring const & text);
bool hasLyXContents() const;
bool hasGraphicsContents(GraphicsType type = AnyGraphicsType) const;