class_docstr: builder config for LibriSpeech LM
      
code: def __post_init__(self):
      if self.lm_corpus_path is None:
          self.lm_corpus_path = _DL_URL
  
file_path: speechbrain/recipes/LibriSpeech/LM/dataset.py
imports: from __future__ import absolute_import, division, print_function
  import datasets
  import re
label_desc: Use image node_id 2 for calling the LibrispeechLmConfig obj's underlying member method code with example usage: obj.__post_init__() without return types