Man pages matching name net::inet6glue::inet_is_inet6 in section 3pm:

Net::INET6Glue::INET_is_INET6.3pm.en	debian 10 / libnet-inet6glue-perl
Net::INET6Glue::INET_is_INET6.3pm.en	debian 11 / libnet-inet6glue-perl
Net::INET6Glue::INET_is_INET6.3pm.en	debian 12 / libnet-inet6glue-perl