Q_INVOKABLE int onScreenMessage(const QString &message);
Q_INVOKABLE int subscribe(const QString &eventName);
Q_INVOKABLE int unsubscribe(const QString &eventName);
Q_INVOKABLE int onScreenMessage(const QString &message);
Q_INVOKABLE int subscribe(const QString &eventName);
Q_INVOKABLE int unsubscribe(const QString &eventName);