=head2 $app->setup_finalize
A hook to attach modifiers to.
-Using C< after setup => sub{}; > doesn't work, because of quirky things done for plugin setup.
+Using C<< after setup => sub{}; >> doesn't work, because of quirky things done for plugin setup.
Also better than C< setup_finished(); >, as that is a getter method.
sub setup_finalize {