QPixmap QPixmap::grabWidget(QObject *widget, const QRect &rectangle)
{
    QPixmap pixmap;
    // ### Qt5: should we keep or remove this method?
    // SC solution would be to install a callback form QtWidgets, but ugly.
    qWarning("QPixmap::grabWidget is deprecated, use QWidget::grab() instead");
    if (!widget)
        return pixmap;
    QMetaObject::invokeMethod(widget, "grab", Qt::DirectConnection,
                              Q_RETURN_ARG(QPixmap, pixmap),
                              Q_ARG(QRect, rectangle));
    return pixmap;
}

    bool isNull() const; // ### Qt 5: make inline
...
    int width() const; // ### Qt 5: make inline
    int height() const; // ### Qt 5: make inline