void set_source(const std::string &, const std::string & = "<string>");
void load_source(IO::Base &, DataFile::Collection * = 0, const std::string & = "<file>");
void load_source(IO::Base &, const std::string &);
void set_source(const std::string &, const std::string & = "<string>");
void load_source(IO::Base &, DataFile::Collection * = 0, const std::string & = "<file>");
void load_source(IO::Base &, const std::string &);