if a.Key == slog.TimeKey {
				return slog.Attr{}
			}

			// Customize the name of the level key and the output string, including
			// custom level values.
			if a.Key == slog.LevelKey {
				// Rename the level key from "level" to "sev".
				a.Key = "sev"

				// Handle custom level values.
				level := a.Value.Any().(slog.Level)