// In addition to the default log levels, it introduces Trace, Notice, and
// Emergency levels. The ReplaceAttr changes the way levels are printed for both
// the standard log levels and the custom log levels.
func ExampleHandlerOptions_customLevels() {
	// Exported constants from a custom logging package.
	const (
		LevelTrace     = slog.Level(-8)
		LevelDebug     = slog.LevelDebug
		LevelInfo      = slog.LevelInfo
		LevelNotice    = slog.Level(2)