virtual bool is_loadable(const CollectionItemTypeBase &, const std::string &) const;
virtual NameList get_names(const CollectionItemTypeBase &) const;
virtual void load(Collection &, const CollectionItemTypeBase &, const std::string &) const;
virtual bool is_loadable(const CollectionItemTypeBase &, const std::string &) const;
virtual NameList get_names(const CollectionItemTypeBase &) const;
virtual void load(Collection &, const CollectionItemTypeBase &, const std::string &) const;