Man pages matching name bio::event::eventhandleri in section 3pm:

Bio::Event::EventHandlerI.3pm.en	debian 10 / libbio-perl-perl
Bio::Event::EventHandlerI.3pm.en	debian 11 / libbio-perl-perl
Bio::Event::EventHandlerI.3pm.en	debian 12 / libbio-perl-perl