https://metacpan.org/pod/Dancer2::Core::Role::Engine
Dancer2::Core::Role::Engine - Role for engines - metacpan.org
for enginesdancer2corerolemetacpan
https://www.perl.com/article/porting-a-dancer-plugin-to-dancer2/
Porting a Dancer plugin to Dancer2
How I ported a plugin without having to know it all first
a dancerportingplugindancer2