/usr/lib/x86_64-linux-gnu/perl5/5.24/X11/XCB/Event/MapNotify.pm is in libx11-xcb-perl 0.16-1+b1.
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 | package X11::XCB::Event::MapNotify;
use Mouse;
# XXX: the following are filled in by XS
has [ 'response_type', 'sequence', 'event', 'window' ] => (is => 'ro', isa => 'Int');
__PACKAGE__->meta->make_immutable;
1
# vim:ts=4:sw=4:expandtab
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