declare property of non-createble C++ type

[Rem-Kolomna]

I expose my C++ object into qml using function:
qmlRegisterUncreatableType<MyObj>("myapp", 1, 0, "MyObj", "");

This object can not be created directly, but returned from other functions. Like this:

property var obj;
...
obj = test.getMyObj();

I'm trying to declare property type (to get context help)

property MyObj obj: undefined

but get qml error "Element is not creatable."

Is it possible to declare property of non-createble C++ type?

[Rem-Kolomna]

Duplicate. As I can see here https://forum.qt.io/topic/25200/using-non-creatable-type-in-qml it isn't possible. But I don't understand why the way qml initialize objects makes this thing impossible.