Return parent method results

So I would like this but I have a strong feeling you're going to say no.

I want a plugin to run with the subscription data but be able to halt the process before all the data is saved and onAKSubscriptionChange runs. I'm basically doing extra validation checks on the username + company details which as far as I can tell isn't covered by onValidate (cause that is only for the custom fields).

So with this you can run the standard FOF event onContentBeforeSave and just trigger as a regular content plugin.