/usr/lib/x86_64-linux-gnu/perl5/5.26/Gtk2/Notify/index.pod is in libgtk2-notify-perl 0.05-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | =head1 NAME
Gtk2::Notify - API Reference Pod Index
=head1 PAGES
=over
=item L<Gtk2::Notify>
=back
|