Is this a bug/typo?

  :systemd.ready(),
      :systemd.set_status(down: [status: "drained"]),
      {Plug.Cowboy.Drainer, refs: :all, shutdown: 10_000},
      :systemd.set_status(down: [status: "draining"])

Shouldn’t the status be set to “draining” first and then, after drain is complete, to “drained”?