title: How to find the index of a specific row in QMap based QAbstractListModel?
body: <p>I have a class derived from <code>QAbstractListModel</code> based on a <code>QMap&lt;QUuid, CustomObject&gt;</code> which I am visualizing with <code>ListView</code> in qml. Some time during my applications running time I am removing some items from this map based on it's <code>QUuid</code>. When I am doing the removing I would like to call <code>beginRemoveRows</code> so the <code>ListView</code> is notified that it's content is changing and needs to redraw itself. How do I find out the right indexes for <code>beginRemoveRows</code>?</p>