docs: def flatten_image(image, dest_image=None, no_op_cmd='/bin/true', create_kwargs={}, start_kwargs={}):
      """
      Exports a Docker image's file system and re-imports it into a new (otherwise new) image. Note that this does not
      transfer the image configuration. In order to gain access to the container contents, the image is started with a
      non-operational command, such as ``/bin/true``. The container is removed once the new image has been created.
  
      :param image: Image id or tag.
      :type image: unicode
      :param dest_image: Tag for the new image.
      :type dest_image: unicode
      :param no_op_cmd: Dummy command for starting temporary container.
      :type no_op_cmd: unicode
      :param create_kwargs: Optional additional kwargs for creating the temporary container.
      :type create_kwargs: dict
      :param start_kwargs: Optional additional kwargs for starting the temporary container.
      :type start_kwargs: dict
      """
      dest_image = dest_image or image
      with temp_container(image, no_op_cmd=no_op_cmd, create_kwargs=create_kwargs, start_kwargs=start_kwargs) as c:
          run('docker export {0} | docker import - {1}'.format(c, dest_image), shell=False)