问子类是否需要Q_INTERFACES宏？

EN

#include <QObject>

class IMovable
{
public slots:
    virtual void moveLeft(int distance) = 0;
    virtual void moveRight(int distance) = 0;
    virtual void moveUp(int distance) = 0;
    virtual void moveDown(int distance) = 0;
signals:
    virtual void moved(int x, int y) = 0;
};

Q_DECLARE_INTERFACE(IMovable, "my_IMovable")

#include <QObject>
#include "IMovable.h"

class A : public QObject, public IMovable
{
    Q_OBJECT
    Q_INTERFACES(IMovable)
public:
    explicit A(QObject *parent = nullptr);
    virtual ~A();

public slots:
    //implement IMovable public slots
    void moveLeft(int distance) override;
    void moveRight(int distance) override;
    void moveUp(int distance) override;
    void moveDown(int distance) override;

signals:
    //implement IMovable signals
    void moved(int x, int y) override;
};

#include "A.h"

class B : public A
{
    Q_OBJECT
    // Do I need Q_INTERFACES(IMovable) here?
    ...
};