+
+ public abstract void subscribe() throws DBus.Error;
+ public abstract void unsubscribe() throws DBus.Error;
+
+ public abstract signal void unit_new(string id, ObjectPath path);
+ public abstract signal void unit_removed(string id, ObjectPath path);
+ public abstract signal void job_new(uint32 id, ObjectPath path);
+ public abstract signal void job_removed(uint32 id, ObjectPath path);