    # File lib/merb-core/bootloader.rb, line 1222
      def self.run
        # Require all standard session containers.
        Dir[Merb.framework_root / "merb-core" / "dispatch" / "session" / "*.rb"].each do |file|
          base_name = File.basename(file, ".rb")
          require file unless base_name == "container" || base_name == "store_container"
        end

        # Set some defaults.
        Merb::Config[:session_id_key] ||= "_session_id"

        # List of all session_stores from :session_stores and :session_store config options.
        config_stores = Merb::Config.session_stores

        # Register all configured session stores - any loaded session container class
        # (subclassed from Merb::SessionContainer) will be available for registration.
        Merb::SessionContainer.subclasses.each do |class_name|
          if(store = Object.full_const_get(class_name)) &&
            config_stores.include?(store.session_store_type)
              Merb::Request.register_session_type(store.session_store_type, class_name)
          end
        end

        # Mixin the Merb::Session module to add app-level functionality to sessions
        overrides = (Merb::Session.instance_methods & Merb::SessionContainer.instance_methods)
        overrides.each do |m|
          Merb.logger.warn!("Warning: Merb::Session##{m} overrides existing " \
                            "Merb::SessionContainer##{m}")
        end
        Merb::SessionContainer.send(:include, Merb::Session)
        nil
      end