Ruby on Rails

# code in my rails engine

moduel MyEngine
  class SomeController
    extend ActiveSupport::Concern
  
    def engine_some_method
    end
  end
end


# code in my rails app where engine is implemented

class SomeController
  include MyEngine::SomeController

  def app_some_method
  end

  # code that's available by including the Rails Engine code
  # def engine_some_method
  # end
end