void set_from_xml (std::shared_ptr<const Film> film, cxml::ConstNodePtr node, int version, std::list<std::string>& notes);
void add (std::shared_ptr<const Film> film, std::shared_ptr<Content>);
void set_from_xml (std::shared_ptr<const Film> film, cxml::ConstNodePtr node, int version, std::list<std::string>& notes);
void add (std::shared_ptr<const Film> film, std::shared_ptr<Content>);