Alternatively: [``self.country = options[:country]``](https://github.com/Shopify/active_merchant/blob/96852355f90d7bdfc9a7925b0fdaecc891eb770b/lib/active_merchant/billing/integrations/universal/helper.rb#L10) plus [standard mapping](https://github.com/Shopify/active_merchant/blob/96852355f90d7bdfc9a7925b0fdaecc891eb770b/lib/active_merchant/billing/integrations/universal/helper.rb#L38).