class Rails::Application::Configuration

def session_store(*args)
  if args.empty?
    case @session_store
    when :disabled
      nil
    when :active_record_store
      ActiveRecord::SessionStore
    when Symbol
      ActionDispatch::Session.const_get(@session_store.to_s.camelize)
    else
      @session_store
    end
  else
    @session_store = args.shift
    @session_options = args.shift || {}
  end
end