method_missing

# File railties/lib/rails/paths.rb, line 8
      def method_missing(id, *args)
        name = id.to_s

        if name =~ /^(.*)=$/ || args.any?
          @children[$1 || name] = Path.new(@root, *args)
        elsif path = @children[name]
          path
        else
          super
        end
      end