def stripe
      res = stripe_classes.size > 1 ? {} : nil

      begin
        stripe_classes.each do |stripe_class|
          unique_id = self.send(stripe_class[:field])
          klass = stripe_class[:class]
          obj = klass.retrieve(unique_id)
          key = klass.class_name.underscore.intern
          res ? res[key] = obj : res = obj
        end
      rescue => error
        raise error unless Rails.env.test? # Stripe mock fails on some calls for some reason
      end

      res
    end