const database/sql.LevelDefault

4 uses

	database/sql (current package)
		ctxutil.go#L110: 		if opts.Isolation != LevelDefault {
		sql.go#L133: 	LevelDefault IsolationLevel = iota
		sql.go#L146: 	case LevelDefault:
		sql.go#L167: var _ fmt.Stringer = LevelDefault