title: Google cloud storage(GCS) Check past version's uploaded datetime
body: <p>When Bucket versioning is enabled, we can get all versions of a file by typing</p>
  
  <pre><code>gsutil ls -a gs://path/to/file
  </code></pre>
  
  <p>However, It only shows the original file name and generation number...<br>
  Is there a way to see when those files were uploaded?  </p>