title: Retrieving an old version of a Google Cloud function source
body: <p>I accidentally lost my up to date source file of a cloud function and then deployed again the cloud function with an old version of it.</p>
  
  <p>Each time I deploy a cloud function I see on the console the version id of the deploy.</p>
  
  <p>Is there something I can do to roll back to the previous version of the source file?</p>