lol.pl

role protobuf[Str $file] {
    has $.file is rw;
}

multi trait_mod:<is>(Any $type, :$protobuf!) is export(:DEFAULT, :traits) {
    say "I POOP";
    $type does protobuf[$type];
}

class Monkey is protobuf('hello') {  }

say 'monkey: ', Monkey;