Man pages matching name dancer::plugin::flashmessage in section 3pm:

Dancer::Plugin::FlashMessage.3pm.en	debian 10 / libdancer-plugin-flashmessage-perl
Dancer::Plugin::FlashMessage.3pm.en	debian 11 / libdancer-plugin-flashmessage-perl
Dancer::Plugin::FlashMessage.3pm.en	debian 12 / libdancer-plugin-flashmessage-perl