index.js

function send(payload) {
    // ...
    runOnResponseHook(this._req, this.res, this.handle._hook.onResponse, payload)
}

function wrapReplySend (reply, payload) {
  return function send (payload) {
    // return reply.send(payload)
    return runOnResponseHook(reply._req, reply.res, reply.handle._hook.onResponse, payload)
  }
}

function runOnResponseHook (req, res, onResponse, payload) {   
    // preRouting hook
    setImmediate(
      runHooks,
      new State(req, res, payload),
      hookIterator,
      onResponse,
      wrapReplyEnd
    )
  }
}

function wrapReplyEnd (err, arr) {
  if (err) handleErr(err)
  console.log(this.payload)
  // arr[0] is reply
  // arr[1] is payload
  arr[0].sent = true
  arr[0].res.end(arr[1])
}

function State ( req, res, payload) {
    this.req = req
    this.res = res
    this.payload = payload
}