gistfile1.rb

class MyCustomAroundMiddleware 
  def initialize(app)
    @app = app
  end

  def call(env)
    response = nil
    # stuff to do before the request
    my_around do 
      # stuff
      another_around do 
        # more stuff
        response = @app.call(env)
      end
    end
    response
  end
end