code: def get_deployment_timestamp():
      
      # TODO: Support other deployment situations.
      if os.environ.get('SERVER_SOFTWARE', '').startswith('Google App Engine'):
          version_id = os.environ.get('CURRENT_VERSION_ID')
          major_version, timestamp = version_id.split('.', 1)
          return timestamp
      return 'test'
docs: Returns a unique string represeting the current deployment.
  
      Used for busting caches.