Man pages matching name catmandu::fix::to_json in section 3pm:

Catmandu::Fix::to_json.3pm.en	debian 10 / libcatmandu-perl
Catmandu::Fix::to_json.3pm.en	debian 11 / libcatmandu-perl
Catmandu::Fix::to_json.3pm.en	debian 12 / libcatmandu-perl