I am not a coder, so can anyone help me?
I would like to make a few modifications to the wonderful SmoothRestarter plugin.
I want to change it so that the "server.save" is always done just before a restart.
Can I just add "server.save(null)" to the restart function below?

[why].
I just ran into a situation where "server.saveinterval" did not work.
Everyday when I restart the server, the world is rolled back for quite some time.
I decided to use the Timed Execute plugin to run world.save, based on a past forum post.
(https://umod.org/community/rust/25023-server-seems-to-not-be-saving-rolls-back?page=1)
However, I would like to get a little closer to perfection.

            void RestartNow()
            {
                Instance.KickAll();
                server.save(null);
                Global.quit(null);
            }​

The server saves automatically when the quit command when smooth restart shuts it down. If your server doesn't save, that generally means something is wrong with your save or it wasn't gracefully shut down with either of the mentioned methods.