+inline T &Stage::add_system(Args &&... args)
+{
+ // Ensure that a reflected class exists for scheduling
+ reflector.get_or_create_class<T>();
+
+ auto &sys = systems.emplace_back(std::make_unique<T>(*this, std::forward<Args>(args)...));
+ scheduler.add_system(*sys);
+ pending_reschedule = true;
+ return static_cast<T &>(*sys);
+}
+
+template<typename T>
+inline T *Stage::get_system() const