Man pages matching name catmandu::xml::transformer in section 3pm:

Catmandu::XML::Transformer.3pm.en	debian 10 / libcatmandu-xml-perl
Catmandu::XML::Transformer.3pm.en	debian 11 / libcatmandu-xml-perl
Catmandu::XML::Transformer.3pm.en	debian 12 / libcatmandu-xml-perl