code: def doc_to_target(self, doc):
      return wikitext_detokenizer(doc)
  
file_path: lm-evaluation-harness/lm_eval/tasks/wikitext.py
imports: import re
  from lm_eval.base import PerplexityTask
label_desc: Use image node_id 8 for calling the WikiText obj's underlying member method code with example usage: obj.doc_to_target(doc) and returns: wikitext_detokenizer