#  abstract
module Interface
  class Adapter
    def required_behavior(data, args)
      raise NotImplementedError, 'Must be implemented by child class!'
    end
  end
end

# concrete
module Interface
  class SpecificAdapter < Adapter
    def required_behavior(data, args)
      data.each { |record| specific_behavior(record, args) }
    end

    private

    def specific_behavior(record, args)
      # do stuff to a record with the provided args
    end
  end
end