# File lib/grape/validations/validators/same_as.rb, line 4
      def validate_param!(attr_name, params)
        confirmation = options_key?(:value) ? @option[:value] : @option
        return if params[attr_name] == params[confirmation]
        raise Grape::Exceptions::Validation,
              params: [@scope.full_name(attr_name)],
              message: build_message
      end