// restore the default logger at the end of the test.
	currentLogger := Default()
	currentLogWriter := log.Writer()
	currentLogFlags := log.Flags()
	SetDefault(New(newDefaultHandler(loginternal.DefaultOutput)))
	t.Cleanup(func() {
		SetDefault(currentLogger)
		log.SetOutput(currentLogWriter)
		log.SetFlags(currentLogFlags)
	})

func SetLogLoggerLevel(level Level) (oldLevel Level) {
	oldLevel = logLoggerLevel.Level()
	logLoggerLevel.Set(level)
	return
}

func init() {
	defaultLogger.Store(New(newDefaultHandler(loginternal.DefaultOutput)))
}

// Default returns the default [Logger].
func Default() *Logger { return defaultLogger.Load() }

// SetDefault makes l the default [Logger], which is used by

					WithGroup("s2")
			},
			attrs: attrs,
			want:  "INFO message p1=1 s1.s2.a=1 s1.s2.b=two",
		},
	} {
		t.Run(test.name, func(t *testing.T) {
			var got string
			var h Handler = newDefaultHandler(func(_ uintptr, b []byte) error {
				got = string(b)
				return nil
			})
			if test.with != nil {
				h = test.with(h)
			}
			r := NewRecord(time.Time{}, LevelInfo, "message", 0)

	WithGroup(name string) Handler
}

type defaultHandler struct {
	ch *commonHandler
	// internal.DefaultOutput, except for testing
	output func(pc uintptr, data []byte) error
}

func newDefaultHandler(output func(uintptr, []byte) error) *defaultHandler {
	return &defaultHandler{
		ch:     &commonHandler{json: false},
		output: output,
	}
}

func (*defaultHandler) Enabled(_ context.Context, l Level) bool {