module CsvRowModel
  module HiddenModule
    extend ActiveSupport::Concern

    class_methods do
      def hidden_module
        @hidden_module ||= Module.new.tap { |mod| include mod }
      end

      def define_proxy_method(*args, &block)
        hidden_module.send(:define_method, *args, &block)
      end
    end
  end
end