class Class1 : public QObject {
Q_OBJECT
Q_SINGLETON
Q_ELEMENT
....
};

class Class2 : public QObject {
Q_OBJECT
Q_SINGLETON
Q_ELEMENT
....
};

I understand that when using qmlRegisterSingletonInstance or other methods specified in main.cpp

// main.cpp
...
Class1 instance1;
Class2 instance2;
qmlRegisterSingletonInstance("MyObject1", 1, 0, "MyApi1", instance1.get());
qmlRegisterSingletonInstance("MyObject2", 1, 0, "MyApi2", instance2.get());
...

I can specify the order of the instantiations.

How about when using macro QML_ELEMENT and QML_SINGLETON? Are they instantiated in the order of files inclusion in CMakeLists.txt qt_add_qml_module ? or does it happen during import statements in qml file?