# File lib/lumberjack/rack/request_id.rb, line 16
      def call(env)
        request_id = env[REQUEST_ID]
        if request_id && @abbreviated
          request_id = request_id.split('-'.freeze, 2).first
        end
        Lumberjack.unit_of_work(request_id) do
          @app.call(env)
        end
      end