case LevelSerializable:
		return "Serializable"
	case LevelLinearizable:
		return "Linearizable"
	default:
		return "IsolationLevel(" + strconv.Itoa(int(i)) + ")"
	}
}

var _ fmt.Stringer = LevelDefault

// TxOptions holds the transaction options to be used in [DB.BeginTx].
type TxOptions struct {
	// Isolation is the transaction isolation level.

func (*XM) String() string { return "" }

func TestPtrToMethods(t *testing.T) {
	var y struct{ XM }
	yp := New(TypeOf(y)).Interface()
	_, ok := yp.(fmt.Stringer)
	if !ok {
		t.Fatal("does not implement Stringer, but should")
	}
}

func TestMapAlloc(t *testing.T) {
	m := ValueOf(make(map[int]int, 10))
	k := ValueOf(5)
	v := ValueOf(7)