title: How to write a value from the response to a file in Gatling?
body: <p>I have a script which creates new referenceId each time its executed. I used </p>
  
  <pre><code>.check(regex("orders.(.*?)\"").saveAs("referenceId")))
  </code></pre>
  
  <p>to extract the referenceId. Now, how can I write/append it to a file without impacting the script even if I run it as a load test?</p>