code: def restore(self, image):
          
          if isinstance(image, Image):
              image = image.id
          return self.act(type='restore', image=image)
docs: Restore the droplet to the specified backup image
  
              A Droplet restoration will rebuild an image using a backup image.
              The image ID that is passed in must be a backup of the current
              Droplet instance.  The operation will leave any embedded SSH keys
              intact. [APIDocs]_
  
          :param image: an image ID, an image slug, or an `Image` object
              representing a backup image of the droplet
          :type image: integer, string, or `Image`
          :return: an `Action` representing the in-progress operation on the
              droplet
          :rtype: Action
          :raises DOAPIError: if the API endpoint replies with an error