/usr/share/perl5/RT/Client/REST/ is in librt-client-rest-perl 1:0.50-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/RT/Client/REST/Attachment.pm
/usr/share/perl5/RT/Client/REST/Exception.pm
/usr/share/perl5/RT/Client/REST/Forms.pm
/usr/share/perl5/RT/Client/REST/Group.pm
/usr/share/perl5/RT/Client/REST/HTTPClient.pm
/usr/share/perl5/RT/Client/REST/Object/
/usr/share/perl5/RT/Client/REST/Object.pm
/usr/share/perl5/RT/Client/REST/Object/Exception.pm
/usr/share/perl5/RT/Client/REST/Queue.pm
/usr/share/perl5/RT/Client/REST/SearchResult.pm
/usr/share/perl5/RT/Client/REST/Ticket.pm
/usr/share/perl5/RT/Client/REST/Transaction.pm
/usr/share/perl5/RT/Client/REST/User.pm