This file is indexed.

/usr/include/KF5/KItemModels/KRearrangeColumnsProxyModel is in libkf5itemmodels-dev 5.44.0-0ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#include "krearrangecolumnsproxymodel.h"