Man pages matching name test2::event::warning in section 3pm:

Test2::Event::Warning.3pm.en	debian 10 / libtest2-plugin-nowarnings-perl
Test2::Event::Warning.3pm.en	debian 11 / libtest2-plugin-nowarnings-perl
Test2::Event::Warning.3pm.en	debian 12 / libtest2-plugin-nowarnings-perl