How do I know if response has already been rendered?

[please-fill-out-this-field]

I want this:

$app->helper('my_app.already_rendered', sub {...});

# Elsewhere
return $log->trace('Response already rendered for action "foo"')
  if $c->my_app->already_rendered;

$c->render(...);

I could probably just inspect mojo.respond or mojo.finished and make the decision based on that, but neither of them is documented which makes me want to avoid them:

$ git grep mojo.respond
lib/Mojolicious/Renderer.pm:  croak 'A response has already been rendered' if $c->stash->{'mojo.respond'}++;
$ git grep mojo.finished
lib/Mojolicious/Controller.pm:  if (!$stash->{'mojo.finished'} && ++$stash->{'mojo.finished'}) {
$

I assume they're both for internal use only and I'm not supposed to access them directly in application code?
Perhaps there's some "proper" way to do what I want?

[kraih]

All mojo.* stash values are private and will break in the future.

[rabbiveesh]

The safe thing to do is to see if the $c->res has a code

[please-fill-out-this-field]

Thanks, worked for me.