/usr/share/perl5/Plack/Server/Coro.pm is in libcorona-perl 0.1004-3.
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 | package Plack::Server::Coro;
use base qw(Plack::Handler::Corona);
our $VERSION = '0.1002';
1;
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