pkg log/slog, const KindTime = 6 #56345
pkg log/slog, const KindTime Kind #56345
pkg log/slog, const KindUint64 = 7 #56345
pkg log/slog, const KindUint64 Kind #56345
pkg log/slog, const LevelDebug = -4 #56345
pkg log/slog, const LevelDebug Level #56345
pkg log/slog, const LevelError = 8 #56345
pkg log/slog, const LevelError Level #56345
pkg log/slog, const LevelInfo = 0 #56345
pkg log/slog, const LevelInfo Level #56345

	h := slog.NewJSONHandler(os.Stderr, &slog.HandlerOptions{Level: programLevel})
	slog.SetDefault(slog.New(h))

Now the program can change its logging level with a single statement:

	programLevel.Set(slog.LevelDebug)

# Groups

Attributes can be collected into groups.
A group has a name that is used to qualify the names of its attributes.
How this qualification is displayed depends on the handler.

		{"KindGroup", Const, 21},
		{"KindInt64", Const, 21},
		{"KindLogValuer", Const, 21},
		{"KindString", Const, 21},
		{"KindTime", Const, 21},
		{"KindUint64", Const, 21},
		{"Level", Type, 21},
		{"LevelDebug", Const, 21},
		{"LevelError", Const, 21},
		{"LevelInfo", Const, 21},
		{"LevelKey", Const, 21},
		{"LevelVar", Type, 21},
		{"LevelWarn", Const, 21},
		{"Leveler", Type, 21},
		{"Log", Func, 21},