module ISO3166::CountryFinderMethods

def find_all_by(attribute, val)
  attributes, lookup_value = parse_attributes(attribute, val)
  ISO3166::Data.cache.select do |_k, value|
    country = Country.new(value)
    attributes.any? do |attr|
      Array(country.send(attr)).any? do |attr_value|
        lookup_value === cached(attr_value) { parse_value(attr_value) }
      end
    end
  end
end