boost::signals2::scoped_connection _film_changed_connection;
boost::signals2::scoped_connection _playlist_change_connection;
boost::signals2::scoped_connection _playlist_content_change_connection;
boost::signals2::scoped_connection _film_changed_connection;
boost::signals2::scoped_connection _playlist_change_connection;
boost::signals2::scoped_connection _playlist_content_change_connection;