code: def decode(self, ids, strip_extraneous=False):
      
      if strip_extraneous:
        ids = strip_ids(ids, list(range(self._num_reserved_ids or 0)))
      return " ".join(self.decode_list(ids))
docs: Transform a sequence of int ids into a human-readable string.
  
      EOS is not expected in ids.
  
      Args:
        ids: list of integers to be converted.
        strip_extraneous: bool, whether to strip off extraneous tokens
          (EOS and PAD).
  
      Returns:
        s: human-readable string.