Man pages matching name anyevent::memcached::hash::withnext in section 3pm:

AnyEvent::Memcached::Hash::WithNext.3pm.en	debian 10 / libanyevent-memcached-perl
AnyEvent::Memcached::Hash::WithNext.3pm.en	debian 11 / libanyevent-memcached-perl
AnyEvent::Memcached::Hash::WithNext.3pm.en	debian 12 / libanyevent-memcached-perl