Qt 5 to-do in QWidget

void QWidget::setContentsMargins(int left, int top, int right, int bottom)
{
...
    // ### Qt 5: compat, remove
    if (isVisible()) {
        update();
        QResizeEvent e(data->crect.size(), data->crect.size());
        QApplication::sendEvent(this, &e);
    } else {
        setAttribute(Qt::WA_PendingResizeEvent, true);
    }
...
}