std::list<dcpomatic::DCPTimePeriod> reels (std::shared_ptr<const Film> film) const;
bool can_reference (
std::shared_ptr<const Film> film,
std::list<dcpomatic::DCPTimePeriod> reels (std::shared_ptr<const Film> film) const;
bool can_reference (
std::shared_ptr<const Film> film,