text: const express = require('express');
  const app = express();
  const assert = require('assert');
  
  app.get("/", (req, res) => {
    res.send("")
  });
  
  console.log(app._router.stack)
  
  assert(app._router.stack[2].route.path === "")
  // assert(app._router.stack[3].route.path === "/a")
  