You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: flash.rb
    path of file: ./repos/padrino-framework/padrino-core/lib/padrino-core/application
    
    the code of the file until where you have to start completion: module Padrino
  module Flash

    class << self
      def registered(app)
        app.helpers Helpers
        app.after do
          session[:_flash] = @_flash.next if @_flash
        end
      end
    end

    cla
    
      def redirect(url, *args)
        flashes = args.last.is_a?(Hash) ? args.pop : {}

        flashes.each do |type, message|
          message = I18n.translate(message) if message.is_a?(Symbol) && defined?(I18n)
          flash[type] = message
        end

        super(url, args)
      end