pe of the server's MakeCallback().
  async_hooks.executionAsyncId();

}).listen(port, () => {
  // Returns the ID of a TickObject (i.e. process.nextTick()) because all
  // callbacks passed to .listen() are wrapped in a nextTick().
  async_hooks.executionAsyncId();
});
</code></pre>
<p>Promise contexts may not get precise <code>executionAsyncIds</code> by default.
See the section on <a href="#async_hooks_promise_execution_tracking">promise execution tracking</a>.</p>
<h4><code>async_hooks.triggerAsyncId()</