auto messageBox = qobject_cast<QQuickItem*>(sender());    auto keys = _messageBoxes.keys(messageBox);    if (keys.length() > 0) {        auto id = keys[0];  // Should be just one message box.        emit messageBoxClosed(id, button);        disconnect(messageBox);        messageBox->setVisible(false);        messageBox->deleteLater();        _messageBoxes.remove(id);    }}

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