Man pages matching name catalyst::plugin::session::store::fastmmap in section 3pm:

Catalyst::Plugin::Session::Store::FastMmap.3pm.en	debian 10 / libcatalyst-plugin-session-store-fastmmap-perl
Catalyst::Plugin::Session::Store::FastMmap.3pm.en	debian 11 / libcatalyst-plugin-session-store-fastmmap-perl
Catalyst::Plugin::Session::Store::FastMmap.3pm.en	debian 12 / libcatalyst-plugin-session-store-fastmmap-perl