docstr: Decodes a batch (list of lists of tokens) into a list of bytes.
docstr_tok: ["Decodes","a","batch","(","list","of","lists","of","tokens",")","into","a","list","of","bytes","."]
code: def decode_bytes_batch(
      self, batch: list[list[int]], *, num_threads: int = 8
  ) -> list[bytes]:
      """Decodes a batch (list of lists of tokens) into a list of bytes."""
      with ThreadPoolExecutor(num_threads) as e:
          return list(e.map(self.decode_bytes, batch))
  
imports: from __future__ import annotations
  import functools
  from concurrent.futures import ThreadPoolExecutor
  from typing import AbstractSet, Collection, Literal, NoReturn, Optional, Union
  import regex
  from tiktoken import _tiktoken
label_desc: Use image node_id 15 for calling the Encoding obj's underlying member method code with example usage: obj.decode_bytes_batch(batch) and returns: list