.addFunction ("track_by_diskstream_id", &Session::track_by_diskstream_id)
.addFunction ("source_by_id", &Session::source_by_id)
.addFunction ("controllable_by_id", &Session::controllable_by_id)
.addFunction ("track_by_diskstream_id", &Session::track_by_diskstream_id)
.addFunction ("source_by_id", &Session::source_by_id)
.addFunction ("controllable_by_id", &Session::controllable_by_id)