/usr/share/perl5/Plack/Middleware/Debug/Panel.pm is in libplack-middleware-debug-perl 0.16+dfsg-1.
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 | package Plack::Middleware::Debug::Panel;
use strict;
use warnings;
use Plack::Util::Accessor qw(dom_id url title nav_title nav_subtitle content disabled);
sub new { bless {}, shift }
sub disable { $_[0]->disabled(1); return }
1;
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