boost::filesystem::path directory_or (boost::optional<boost::filesystem::path> dir, boost::filesystem::path a) const;
void add_to_history_internal (std::vector<boost::filesystem::path>& h, boost::filesystem::path p);
void backup ();
+#ifdef DCPOMATIC_VARIANT_SWAROOP
+ dcp::Data key_from_uuid () const;
+#endif
template <class T>
void maybe_set (T& member, T new_value, Property prop = OTHER) {