Fix bad id key

nsUndefined.go

@@ -10,7 +10,7 @@ func (u *UDIdData) GetSelfOrBase() (BaseApChain, bool) {
 }
 
 func (b *UDIdData) MarshalToMap() map[string]any {
-	return appendWithKey(b.Next.MarshalToMap(), "KEY_ID", b.Id)
+	return appendWithKey(b.Next.MarshalToMap(), KEY_ID, b.Id)
 }
 
 func ParseUDIdData(raw map[string]any, next BaseApChain) (BaseApChain, error) {

variousTypes.go

@@ -56,6 +56,9 @@ func (i IdValue) Marshal() map[string]any {
 
 func (v ValueValue[T]) Marshal() map[string]any {
 	m := maps.Clone(v.OtherThings)
+	if m == nil {
+		m = map[string]any{}
+	}
 	m[KEY_VALUE] = v.Value
 	if v.Type != nil {
 		m[KEY_TYPE] = *v.Type