    # File lib/rack/recursive.rb, line 48
        def include(env, path)
          unless path.index(@script_name) == 0 && (path[@script_name.size] == ?/ ||
                                                   path[@script_name.size].nil?)
            raise ArgumentError, "can only include below #{@script_name}, not #{path}"
          end

          env = env.merge(PATH_INFO => path,
                          SCRIPT_NAME => @script_name,
                          REQUEST_METHOD => "GET",
                          "CONTENT_LENGTH" => "0", "CONTENT_TYPE" => "",
                          "rack.input" => StringIO.new(""))
          @app.call(env)
        end