Man pages matching name anyevent::cachedns in section 3pm:

AnyEvent::CacheDNS.3pm.en	debian 10 / libanyevent-cachedns-perl
AnyEvent::CacheDNS.3pm.en	debian 11 / libanyevent-cachedns-perl
AnyEvent::CacheDNS.3pm.en	debian 12 / libanyevent-cachedns-perl