Man pages matching name cgi::formbuilder::source in section 3pm:

CGI::FormBuilder::Source.3pm.en	debian 10 / libcgi-formbuilder-perl
CGI::FormBuilder::Source.3pm.en	debian 11 / libcgi-formbuilder-perl
CGI::FormBuilder::Source.3pm.en	debian 12 / libcgi-formbuilder-perl