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// a.h//////////////////////////////////////////////////////////////////////////////#ifndef A_H#define A_H#include <QtGlobal>#include <QObject>#ifdef BUILD_A#    define A_EXPORT Q_DECL_EXPORT#else#    define A_EXPORT Q_DECL_IMPORT#endif // BUILD_Aclass A_EXPORT A : public QObject{    Q_OBJECT    Q_ENUMS(Foo)public:    enum Foo    {        Bar    };    void dummyFunction();};#endif // A_H// b.h//////////////////////////////////////////////////////////////////////////////#ifndef B_H#define B_H#include <QtGlobal>#include <QObject>#include "a.h"#ifdef BUILD_B#    define B_EXPORT Q_DECL_EXPORT#else#    define B_EXPORT Q_DECL_IMPORT#endif // BUILD_Bclass B_EXPORT B : public QObject{    Q_OBJECT    Q_PROPERTY(A::Foo foo READ foo) // <--------------- !!!public:    A::Foo foo() const;};#endif // B_H