observer.observe<Events::EntityCreated>([this](auto &){ transforms_dirty = true; });
observer.observe<Events::EntityDestroyed>([this](auto &){ transforms_dirty = true; });
}
observer.observe<Events::EntityCreated>([this](auto &){ transforms_dirty = true; });
observer.observe<Events::EntityDestroyed>([this](auto &){ transforms_dirty = true; });
}