Man pages matching name markdent::role::filterhandler in section 3pm:

Markdent::Role::FilterHandler.3pm.en	debian 10 / libmarkdent-perl
Markdent::Role::FilterHandler.3pm.en	debian 11 / libmarkdent-perl
Markdent::Role::FilterHandler.3pm.en	debian 12 / libmarkdent-perl