This file is indexed.

/etc/ufw/applications.d/cups is in cups-daemon 1.7.2-0ubuntu1.

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

The actual contents of the file can be viewed below.

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[CUPS]
title=Common UNIX Printing System server
description=CUPS is a printing system with support for IPP, samba, lpd, and other protocols.
ports=631