Man pages matching name data::treedumper::oo in section 3pm:

Data::TreeDumper::OO.3pm.en	debian 10 / libdata-treedumper-oo-perl
Data::TreeDumper::OO.3pm.en	debian 11 / libdata-treedumper-oo-perl
Data::TreeDumper::OO.3pm.en	debian 12 / libdata-treedumper-oo-perl