Man pages matching name monitoring::livestatus::class::abstract::filter in section 3pm:

Monitoring::Livestatus::Class::Abstract::Filter.3pm.en	debian 10 / libmonitoring-livestatus-class-perl
Monitoring::Livestatus::Class::Abstract::Filter.3pm.en	debian 11 / libmonitoring-livestatus-class-perl
Monitoring::Livestatus::Class::Abstract::Filter.3pm.en	debian 12 / libmonitoring-livestatus-class-perl