code: def diff(self, container):
          
          return self._result(
              self._get(self._url("/containers/{0}/changes", container)), True
          )
docs: Inspect changes on a container's filesystem.
  
          Args:
              container (str): The container to diff
  
          Returns:
              (str)
  
          Raises:
              :py:class:`docker.errors.APIError`
                  If the server returns an error.